Average of 12 numbers is 40. If average of first 7 is 38, what is average of last 5? MCQ with Answer and Explanation

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Average of 12 numbers is 40. If average of first 7 is 38, what is average of last 5?

A. 44

B. 43

C. 40

D. 42

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum12=480. Sum first7=266. Sum last5=214. Average last5=42.8 ≈ but use exact numbers.

This question belongs to: Maths Average

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Question #1

The average of 42,56,70 is

A. 56

B. 50

C. 55

D. 60

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Correct Answer: Option A

Explanation:
168/3=56.

This question belongs to: Maths Average

Question #2

Average of 15 numbers 1060. If average of 9 is 1055, average of remaining 6?

A. 1067.5

B. 1070

C. 1068

D. 1065

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Correct Answer: Option A

Explanation:
Sum15=15900. Sum9=9495. Remaining=6405. Average=1067.5.

This question belongs to: Maths Average

Question #3

Find the average of the first 5 multiples of 7.

A. 22

B. 21

C. 19.5

D. 20

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Correct Answer: Option B

Explanation:
Multiples:7,14,21,28,35 sum=105, count=5, avg=21.

This question belongs to: Maths Average

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