Discussion
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- Question
What is the average of first 39 even numbers ?
Options- A. 39
- B. 40
- C. 20
- D. 68
- Correct Answer
- 40
- 1. What is the average of all natural numbers from 21 to 39?
Options- A. 30
- B. 31
- C. 29
- D. 28 Discuss
- 2. The average revenues of 9 consecutive years of a company is Rs 76 lakhs. If the average of first 5 years is Rs 71 lakhs and that of last 5 years is Rs 83 lakhs, find the revenue for the 5th year.
Options- A. Rs 88 lakhs
- B. Rs 84 lakhs
- C. Rs 86 lakhs
- D. Rs 82 lakhs Discuss
- 3. The average weight of 100 students is 32 kg. The average weight of first 49 students is 30 kg and of last 50 students is 34 kg. What is the weight (in kg) of the 50th student?
Options- A. 25
- B. 30
- C. 32
- D. 33 Discuss
- 4. The average of 50 consecutive natural numbers is x. What will be the are average when the next four natural numbers are also included?
Options- A. x + 1
- B. x + 2
- C. x + 4
- D. x + (x/54) Discuss
- 5. Average age of a team having 12 players is 23 years. If the age of the coach is also included, then the average age increases by 2 years. What is the age (inyears) of the coach?
Options- A. 41
- B. 47
- C. 49
- D. 51 Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Average problems
Search Results
Correct Answer: 30
Correct Answer: Rs 86 lakhs
Correct Answer: 30
Correct Answer: x + 2
Explanation:
Sum of n consecutive natural numbers = n(n+1)/2
Average of n consecutive natural numbers = (n+1)/2
For first 50 average = 51/2 = x
Last 50 average = 55/2 = x+2
Correct Answer: 49
Correct Answer: 36
Correct Answer: 66
Correct Answer: 71
Correct Answer: 13.5
Correct Answer: 6.25
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