The average of 3 numbers is 15. If each number is multiplied by 2, what is the new average? MCQ with Answer and Explanation

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The average of 3 numbers is 15. If each number is multiplied by 2, what is the new average?

A. 30

B. 45

C. 15

D. 60

Answer: Option A

Solution (By JKSSB Mock Tests)

New average =15×2=30.

This question belongs to: Maths Average

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Question #1

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Average temperature for 5 days 32°C. If 6th day 38°C, new average?

A. 32.5

B. 33.33

C. 33

D. 34

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Correct Answer: Option C

Explanation:
Total5=160. New total=198. /6=33.

This question belongs to: Maths Average

Question #2

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The average marks of 12 students is 72. If a student with 88 marks leaves, what is the new average?

A. 71.5

B. 70.55

C. 71

D. 70

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Correct Answer: Option B

Explanation:
Sum=12×72=864. New sum=864-88=776. New avg=776/11=70.545≈70.55.

This question belongs to: Maths Average

Question #3

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Average of 9 numbers 1190. If average of 6 is 1185, average of remaining 3?

A. 1200

B. 1195

C. 1198

D. 1205

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Correct Answer: Option A

Explanation:
Sum9=10710. Sum6=7110. Remaining=3600. Average=1200.

This question belongs to: Maths Average

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