The average of 10 numbers is 15. If each number is increased by 10, what is the new average? MCQ with Answer and Explanation

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The average of 10 numbers is 15. If each number is increased by 10, what is the new average?

A. 20

B. 25

C. 15

D. 30

Answer: Option B

Solution (By JKSSB Mock Tests)

New average =15+10=25.

This question belongs to: Maths Average

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Question #1

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The average of 5 numbers is 18. If one number is 25 and another is 15, find the average of the remaining 3 numbers.

A. 16

B. 16.67

C. 18

D. 17

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Correct Answer: Option B

Explanation:
Sum=5×18=90. Sum of two=25+15=40. Sum of three=50. Average=50/3=16.67.

This question belongs to: Maths Average

Question #2

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What is the average of the first 5 composite numbers?

A. 7.6

B. 7.4

C. 8.0

D. 7.2

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Correct Answer: Option B

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

This question belongs to: Maths Average

Question #3

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Average of 25,35,45,55 is

A. 42

B. 45

C. 40

D. 38

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Correct Answer: Option C

Explanation:
Sum=160. Average=40.

This question belongs to: Maths Average

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