The average of 5 numbers is 30. If each number is multiplied by 1.2, what is the new average? MCQ with Answer and Explanation

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The average of 5 numbers is 30. If each number is multiplied by 1.2, what is the new average?

A. 24

B. 42

C. 30

D. 36

Answer: Option D

Solution (By JKSSB Mock Tests)

New average =30×1.2=36.

This question belongs to: Maths Average

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Question #1

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What is the average of the first 5 composite numbers?

A. 7.6

B. 7.2

C. 7.4

D. 8.0

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Correct Answer: Option C

Explanation:
First 5 composites: 4,6,8,9,10 sum=37, avg=37/5=7.4.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 420. If average of 8 is 415, average of remaining 4?

A. 430

B. 432

C. 425

D. 428

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Correct Answer: Option A

Explanation:
Sum12=5040. Sum8=3320. Remaining=1720. Average=430.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 380. If average of 6 is 375, average of remaining 4?

A. 385

B. 386

C. 387.5

D. 390

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Correct Answer: Option C

Explanation:
Sum10=3800. Sum6=2250. Remaining=1550. Average=387.5.

This question belongs to: Maths Average

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