Que- The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally?

a. 4.0

b. 5.0

c. 6.0

d. 7.0

Answer- 4.0

Que- A salt manufacturing company produced a total of 5000 tonnes of salt in January of a particular year. Starting from February its production increased by 100 tonnes every month over the previous months until the end of the year. Find its average monthly production for that year?

a. 6060.0

b. 7070.0

c. 5550.0

d. 4440.0

Answer- 5550.0

Que- The average amount with a group of seven numbers is Rs. 20. If the newly joined member has Rs. 50 with him, what was the average amount with the group before his joining the group?

a. Rs. 25

b. Rs. 18

c. Rs. 15

d. Rs. 22

Answer- Rs. 15

Que- The sum of five numbers is 655. The average of the first two numbers is 85 and the third number is 125. Find the average of the two numbers?

a. 180.0

b. 170.0

c. 190.0

d. 175.0

Answer- 180.0

Que- Find the average of the series : 312, 162, 132, 142 and 122?

a. 194.0

b. 174.0

c. 162.0

d. 186.0

Answer- 174.0

Que- The average age of a group of 10 persons was decreased by 3 years when one person, whose age was 42 years, was replaced by a new person. Find the age of the new person?

a. 22.0

b. 24.0

c. 12.0

d. 8.0

Answer- 12.0

Que- The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?

a. 72.0

b. 45.0

c. 37.0

d. 79.0

Answer- 72.0

Que- The average of 10 numbers is 23. If each number is increased by 4, what will the new average?

a. 22.0

b. 27.0

c. 25.0

d. 29.0

Answer- 27.0

Que- The average of 35 numbers is 25. If each number is multiplied by 5, find the new average?

a. 125.0

b. 134.0

c. 170.0

d. 98.0

Answer- 125.0

Que- The average salary of a person for the months of January, February, March and April is Rs.8000 and that for the months February, March, April and May is Rs.8500. If his salary for the month of May is Rs.6500, find his salary for the month of January?

a. 3000.0

b. 2500.0

c. 4500.0

d. 5000.0

Answer- 4500.0

Que- The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

a. 50.0

b. 47.5

c. 59.0

d. 52.5

Answer- 52.5

Que- A batsman makes a score of 64 runs in the 16th innings and thus increased his average by 3. Find his average after the 16th inning?

a. 17.0

b. 29.0

c. 18.0

d. 19.0

Answer- 19.0

Que- The average of 13 numbers is 60. Average of the first 7 of them is 57 and that of the last 7 is 61. Find the 8th number?

a. 46.0

b. 32.0

c. 68.0

d. 51.0

Answer- 46.0

Que- Find the average of the first 20 natural numbers?

a. 10.0

b. 11.5

c. 12.0

d. 10.5

Answer- 10.5

Que- The average of 11 results is 50, if the average of first six results is 49 and that of the last six is 52. Find the sixth result?

a. 46.0

b. 56.0

c. 34.0

d. 57.0

Answer- 56.0

Que- The average of five results is 46 and that of the first four is 45. The fifth result is__________?

a. 1.0

b. 10.0

c. 12.5

d. 50.0

Answer- 50.0

Que- Three years ago the average age of a family of six members was 19 years. A boy have been born, the average age of the family is the same today. What is the age of the boy?

a. 1 year

b. 1.5 years

c. 2 years

d. 2.5 years

Answer- 1 year

Que- The average salary per head of the entire staff of an office including the officers and clerks is Rs.90. The average salary of officers is Rs.600 and that of the clerks is Rs.84. If the number of officers is 2, find the number of officers in the office?

a. 1540.0

b. 960.0

c. 840.0

d. 1020.0

Answer- 1020.0

Que- The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

a. 55 kg

b. 62 kg

c. 56 kg

d. None

Answer- None

Que- The average marks in mathematics scored by the students of a school at the public examination were 39. If four of these students who actually scored 5, 12, 15 and 19 marks at the examination had not been sent up, the average marks for the school would have been 44. Find the number of students sent up for examination from the school?

a. 20.0

b. 25.0

c. 30.0

d. 32.0

Answer- 25.0

Que- Nine men went to a hotel. Eight of them spent Rs.3 each over their meals and the ninth spent Rs.2 more than the average expenditure of all the nine. Determine the total money spent by them?

a. Rs.29.25

b. Rs.30.25

c. Rs.32

d. Rs.35

Answer- Rs.29.25

Que- The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?

a. 7 years

b. 11 years

c. 18 years

d. 27 years

Answer- 18 years

Que- The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46 degrees. If the temperature on Monday was 42 degrees. Find the temperature on Friday?

a. 40 degrees

b. 38 degrees

c. 36 degrees

d. 34 degrees

Answer- 34 degrees

Que- A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?

a. Rs.150

b. Rs.225

c. Rs.250

d. None

Answer- None

Que- A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 per day. The average wage per day paid by the contractor is__________?

a. Rs.20

b. Rs.21

c. Rs.22

d. Rs.23

Answer- Rs.21

Que- Visitors to show were charged Rs.15 each on the first day. Rs.7.50 on the second day, Rs.2.50 on the third day and total attendance on the three days were in ratio 2:5:13 respectively. The average charge per person for the whole show is___________?

a. Rs.3

b. Rs.4.50

c. Rs.5.00

d. Rs.7.50

Answer- Rs.5.00

Que- In a hostel there were 100 students. To accommodate 20 more students the average is decreased by rupees 5. But total expenditure increased by Rs.400. Find the total expenditure of the hostel now?

a. Rs.5000

b. Rs.4600

c. Rs.5400

d. Rs.2300

Answer- Rs.5400

Que- A batsman in his 17th innings makes a score of 85 and their by increasing his average by 3. What is his average after the 17th innings?

a. 34.0

b. 35.0

c. 36.0

d. 37.0

Answer- 37.0

Que- The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child?

a. 1 year

b. 2 years

c. 3 years

d. 4 years

Answer- 4 years

Que- The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all together is_________?

a. (mb – nc)/ (m + n) years

b. (mb + nc)/ (m – n) years

c. (mb + nc)/ (m + n) years

d. (mb – nc)/ (m – n) years

Answer- (mb + nc)/ (m + n) years

Que- A team of eight entered for a shooting competition. The best marks man scored 85 points. If he had scored 92 points, the average scores for. The team would have been 84. How many points altogether did the team score?

a. 625.0

b. 665.0

c. 632.0

d. 656.0

Answer- 665.0

Que- The average salary of workers in an industry is Rs.200 the average salary of technicians being Rs.400 and that of non-technicians being Rs.125. What is the total number of workers?

a. 250.0

b. 275.0

c. 550.0

d. 400.0

Answer- 550.0

Que- The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 24 years. Find the average age of the women?

a. 36 years

b. 24 years

c. 30 years

d. 18 years

Answer- 30 years

Que- The average of first five prime numbers greater than 20 is____________?

a. 31.0

b. 31.01

c. 32.0

d. 32.2

Answer- 32.2

Que- The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?

a. 9.0

b. 8.0

c. 7.0

d. 6.0

Answer- 9.0

Que- The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?

a. 8.0

b. 6.0

c. 5.0

d. 2.0

Answer- 5.0

Que- The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?

a. 15.0

b. 9.0

c. 18.0

d. 21.0

Answer- 9.0

Que- The average of first 10 odd numbers is_____________?

a. 11.0

b. 10.0

c. 12.0

d. 17.0

Answer- 10.0

Que- The average of first 10 natural numbers is____________?

a. 5.0

b. 5.5

c. 6.5

d. 6.0

Answer- 5.5

Que- The average of first ten prime numbers which are odd is____________?

a. 12.9

b. 13.8

c. 15.8

d. 17.0

Answer- 15.8

Que- The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.4 the sixth number is_____________?

a. 11.0

b. 11.3

c. 11.4

d. 11.5

Answer- 11.5

Que- The average of first 10 even numbers is___________?

a. 18.0

b. 22.0

c. 9.0

d. 11.0

Answer- 11.0

Que- A steamer goes downstream from one port to another in 4 hours, it covers the same distance upstream in 5 hours. If the speed of the stream is 2km/hr,the distance between the two parts is_______?

a. 50km

b. 60km

c. 70km

d. 80 km

Answer- 80 km

Que- The speed of a motor boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 min, it will come back in_______?

a. 5 hours 50 min

b. 6 hours

c. 6 hours 50 min

d. 12 hours 10 min

Answer- 6 hours 50 min

Que- The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?

a. 5km/hr

b. 8 km/hr

c. 10 km/hr

d. 15 km/hr

Answer- 5km/hr

Que- A boat covers a distance of 30 km in 2 ½ hours running downstream while returning it covers the same distance in 3 ¾ hours. What is the speed of the boat in still water?

a. 8km/hr

b. 12km/hr

c. 14 km/hr

d. None of these

Answer- None of these

Que- A boat goes 24 km downstream in 10 hours, it takes 2 hours more to cover the same distance against the stream. What is the speed of the boat in still water?

a. 2km/hr

b. 2.8 km/hr

c. 4 km/hr

d. None of these

Answer- None of these

Que- A boat running downstream covers 24 km’s in 4 hours while for covering the same distance upstream it takes 6 hours whats the speed of the boat in still water?

a. 3.5km/hr

b. 5.5 km/hr

c. 6 km/hr

d. None of these

Answer- None of these

Que- A person can row at 9 kmph and still water. He takes 4 1/2 hours to row from A to B and back. What is the distance between A and B if the speed of the stream is 1 kmph?

a. 32 km

b. 25 km

c. 28 km

d. None of these

Answer- None of these

Que- The speed at which a man can row a boat in still water is 15 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 60 metres?

a. 10 seconds

b. 15 seconds

c. 20 seconds

d. 12 seconds

Answer- 12 seconds