Average problems
- 1. The median of the numbers 14, 12, 12, 16, 13 and 18 is
Options- A. 13
- B. 14
- C. 14.5
- D. 13.5 Discuss
Correct Answer: 13.5
- 2. The simple interest on a sum for 20 years is 5/4 of the principal. What is the per annum rate (in percentage) of interest?
Options- A. 6.25
- B. 12.5
- C. 2.5
- D. 5 Discuss
Correct Answer: 6.25
- 3. The average weight of 50 boys in a class is 45 Kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.
Options- A. 50 Kg
- B. 50.8 Kg
- C. 49 Kg
- D. 49.9 Kg Discuss
Correct Answer: 49.9 Kg
Explanation:
Total weight of 50 boys = 45 X 50 = 2250
Average weight of 49 boys = 44.9
Total weight of 49 boys = 44.9 X 49 = 2200.1
Weight of boy who left the class=2250?2200.1=49.9
- 4. If a+1a=2 then the vealue of a5+1a5 will be
Options- A. 0
- B. 1
- C. 3
- D. 2 Discuss
Correct Answer: 1
- 5. In the first 39 overs of a cricket match, the run rate was 4.6 runs/over. Calculate the required run rate in the remaining 11 overs to reach the target of 252 runs?
Options- A. 7.2
- B. 5.7
- C. 6.3
- D. 6.6 Discuss
Correct Answer: 6.6
- 6. In a match of 50 overs, team A?s average runs for first thirty overs was 4.5 runs/over while for the remaining 20 overs the average was 5.5 runs/over. Team B chased the target and lost by 10 runs. Find the average runs per over scored by team B. (team B played all the 50 overs).
Options- A. 4.4
- B. 5.2
- C. 4.7
- D. 4.6 Discuss
Correct Answer: 4.7
Explanation:
Total runs scored by team
- 7. In a class of 60 students there are 30 girls. The average weight of these girls is 58 Kg and average weight of the full class is 63 kgs. What is the average weight of the boys of the class?
Options- A. 67
- B. 66
- C. 68
- D. 65 Discuss
Correct Answer: 68
- 8. The mean of 21 observations (all different) is 40. If each observation greater than the median is increased by 21, then the mean of observations will become:
Options- A. 50
- B. 30
- C. 50.5
- D. 45 Discuss
Correct Answer: 50
- 9. The average of fruits offered in a temple in a week was 75. The average of fruits offered in six days excluding Tuesday was 72. How many fruits were offered on Tuesday?
Options- A. 90
- B. 93
- C. 72
- D. 92 Discuss
Correct Answer: 93
- 10. 19 persons went to a hotel for a combined dinner party. 13 of them spent Rs 79 each on their dinner and the rest spent Rs 4 more than the average expenditure of all the 19. What was the total money spent by them?
Options- A. 1628.4
- B. 1534
- C. 1492
- D. None of these Discuss
Correct Answer: None of these
Explanation:
Let the average expenditure of 19 people be x
?19x = 13 X 79 + 6 X (x+4)?19x = 13 X 79 + 6x +24
?x = 80.84
So, total money spent by them = 1536.07
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