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. The average temperature of Monday ,Tuesday , Wednesday and Thursday is 60°, The average for Tuesday, Wednesday, Thursday and Friday is 63°; If the ratio of temperature for Monday and Friday is 21 : 25, then what is the temperature of Friday ?
Options- A. 70°
- B. 73°
- C. 75°
- D. 78° Discuss
- 8. What is the average of all numbers between 8 and 74 which are divisible by 7?
Options- A. 40
- B. 41
- C. 42
- D. 43 Discuss
- 9. 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
- 10. An engineering student has to secure 25% marks to pass. He gets 45 and fails by 45 marks. Find the maximum marks.
Options- A. 385 marks
- B. 410 marks
- C. 435 marks
- D. 360 marks 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: 75°
Correct Answer: 42
Correct Answer: 66
Correct Answer: 360 marks
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