Average problems
- 1. Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is
Options- A. Rs. 70
- B. Rs. 50
- C. Rs. 100
- D. Rs. 120 Discuss
Correct Answer: Rs. 70
- 2. The average age of 120 members of a society is 60.7 years. By addition of 30 new members, the average age becomes 56.3 years. What is the average age (in years) of newly joined members?
Options- A. 36.5
- B. 37.2
- C. 38.3
- D. 38.7 Discuss
Correct Answer: 38.7
- 3. Starting with 8000 workers, the company increases the number of workers by 5%, 10% and 20% at the end of first, second and third year respectively. The number of workers in the fourth yearwas
Options- A. 10188
- B. 11088
- C. 11008
- D. 11808 Discuss
Correct Answer: 11088
- 4. Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?
Options- A. 3.5
- B. 7
- C. 10.5
- D. 14 Discuss
Correct Answer: 14
- 5. In a match, average of runs scored by 7 players is 53. If the runs scored by 6 players are 121, 40, 26, 56, 37 and 48, then how many runs did the 7th player scored?
Options- A. 26
- B. 37
- C. 43
- D. 48 Discuss
Correct Answer: 43
- 6. The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?
Options- A. 11.25
- B. 11.5
- C. 11.75
- D. 12.25 Discuss
Correct Answer: 11.75
- 7. The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?
Options- A. 15
- B. 32
- C. 35
- D. 53.5 Discuss
Correct Answer: 32
- 8. A canteen requires 56 kgs of rice for seven days . The quantity of rice required for the months of April and May together is
Options- A. 468 kg
- B. 488 kg
- C. 498 kg
- D. 508 kg Discuss
Correct Answer: 488 kg
- 9. Due to a price hike of 20% , 4 kg less sugar is available for Rs. 120 . What is the initial price per kg of sugar ?
Options- A. Rs. 5 Kg
- B. Rs. 4 Kg
- C. Rs. 6 Kg
- D. Rs. 5.5 Kg Discuss
Correct Answer: Rs. 5 Kg
- 10. 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 ?
Options- A. 34
- B. 36
- C. 38
- D. 40 Discuss
Correct Answer: 34
Explanation:
M + Tu + W + Th = 4 x 48 = 192
Tu + W + Th + F = 4 x 46 = 184
M = 42
Tu + W + Th = 192 - 42 = 150
F = 184 ? 150 = 34
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