The average of 25 numbers is 40. If the average of first 15 numbers is 38, what is the average of the remaining 10 numbers? MCQ with Answer and Explanation

Question

The average of 25 numbers is 40. If the average of first 15 numbers is 38, what is the average of the remaining 10 numbers?

A. 44

B. 41

C. 42

D. 43

Answer: Option D

Solution (By JKSSB Mock Tests)

Total of 25 numbers = 1000. Total of first 15 = 570. Remaining total = 430. Average = 430/10 = 43.

This question belongs to: Maths Average

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Question #1

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The average of a set of 8 numbers is 32. If one number is 50, what is the average of the remaining numbers?

A. 28.57

B. 30.25

C. 31.00

D. 29.43

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Correct Answer: Option D

Explanation:
Sum of 8 = 256. Sum of remaining 7 = 256-50=206. Average = 206/7 ≈ 29.43.

This question belongs to: Maths Average

Question #2

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The average of 3 numbers is 12. If the numbers are in the ratio 1:2:3, find the smallest.

A. 8

B. 4

C. 10

D. 6

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Correct Answer: Option D

Explanation:
Sum=3×12=36. Ratio sum=6. Smallest = (1/6)×36=6.

This question belongs to: Maths Average

Question #3

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Average of 5 consecutive odd numbers is 27. Largest?

A. 29

B. 31

C. 33

D. 35

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Correct Answer: Option B

Explanation:
Largest=27+4=31.

This question belongs to: Maths Average

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