If average of 5 numbers is 36 and average of 3 is 30, average of remaining 2? MCQ with Answer and Explanation

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If average of 5 numbers is 36 and average of 3 is 30, average of remaining 2?

A. 40

B. 48

C. 42

D. 45

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum5=180. Sum3=90. Remaining=90. Average=45.

This question belongs to: Maths Average

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Question #1

Average of 8 numbers 2100. If average of 5 is 2095, average of remaining 3?

A. 2110

B. 2108.33

C. 2105

D. 2107

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Correct Answer: Option B

Explanation:
Sum8=16800. Sum5=10475. Remaining=6325. Average≈2108.33.

This question belongs to: Maths Average

Question #2

What is the average of the first 12 even numbers?

A. 14

B. 13

C. 13.5

D. 12.5

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Correct Answer: Option B

Explanation:
Sum of first 12 even numbers = 12×13 =156 (since sum = n(n+1) for first n evens). Average=156/12=13.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 260. If average of 9 is 255, average of remaining 6?

A. 268

B. 267.5

C. 270

D. 265

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Correct Answer: Option B

Explanation:
Sum15=3900. Sum9=2295. Remaining=1605. Average=267.5.

This question belongs to: Maths Average

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