The average of 5 numbers is 42. If two numbers are 38 and 44, find the average of the remaining three. MCQ with Answer and Explanation

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The average of 5 numbers is 42. If two numbers are 38 and 44, find the average of the remaining three.

A. 41.33

B. 42

C. 43

D. 42.67

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum=5×42=210. Sum of two=38+44=82. Sum of three=128. Avg=128/3=42.67.

This question belongs to: Maths Average

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Question #1

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The average height of 4 boys is 1.5 m. If a girl of height 1.6 m joins, what is the new average?

A. 1.52 m

B. 1.5 m

C. 1.53 m

D. 1.55 m

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Correct Answer: Option A

Explanation:
Sum of 4 =4×1.5=6.0. Sum of 5=6.0+1.6=7.6. Average=7.6/5=1.52.

This question belongs to: Maths Average

Question #2

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Average of 10 numbers 2580. If average of 6 is 2575, average of remaining 4?

A. 2590

B. 2587.5

C. 2585

D. 2586

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Correct Answer: Option B

Explanation:
Sum10=25800. Sum6=15450. Remaining=10350. Average=2587.5.

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Question #3

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Average of 8 numbers 1750. If average of 5 is 1745, average of remaining 3?

A. 1757

B. 1758.33

C. 1755

D. 1760

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Correct Answer: Option B

Explanation:
Sum8=14000. Sum5=8725. Remaining=5275. Average≈1758.33.

This question belongs to: Maths Average

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