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- Question
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
- Correct Answer
- 49.9 Kg
ExplanationTotal 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
- 1. 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
- 2. 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
- 3. The average weight of two players P and Q of a football team is 38 kg. The average weight of P, Q and their coach T is 49 kg. What is the weight (in kg) of coach?
Options- A. 71
- B. 46
- C. 76
- D. 91 Discuss
- 4. A batsman makes a score of 111 runs in the 10th match and thus increases his average runs per match by 5. What will be his average after the 10th match?
Options- A. 66
- B. 61
- C. 62
- D. 64 Discuss
- 5. A batsman makes a score of 81 runs in the 16th match and thus increases his average runs per match by 3. What is his average after the 16th match?
Options- A. 35
- B. 34
- C. 33
- D. 36 Discuss
- 6. If a+1a=2 then the vealue of a5+1a5 will be
Options- A. 0
- B. 1
- C. 3
- D. 2 Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Average problems
Search Results
Correct Answer: 6.25
Correct Answer: 13.5
Correct Answer: 71
Correct Answer: 66
Correct Answer: 36
Correct Answer: 1
Correct Answer: 6.6
Correct Answer: 4.7
Explanation:
Total runs scored by team
Correct Answer: 68
Correct Answer: 50
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