The average of 8 numbers is 35. If each number is multiplied by 2, what is the new average? MCQ with Answer and Explanation

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The average of 8 numbers is 35. If each number is multiplied by 2, what is the new average?

A. 70

B. 105

C. 17.5

D. 35

Answer: Option A

Solution (By JKSSB Mock Tests)

New average = 35×2=70.

This question belongs to: Maths Average

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Question #1

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If average of 9 numbers is 30 and average of 6 is 28, average of remaining 3?

A. 33

B. 34

C. 32

D. 35

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Correct Answer: Option B

Explanation:
Sum9=270. Sum6=168. Remaining=102. Average=34.

This question belongs to: Maths Average

Question #2

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The average of 75,85,95 is

A. 82

B. 90

C. 80

D. 85

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Correct Answer: Option D

Explanation:
255/3=85.

This question belongs to: Maths Average

Question #3

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Find the average of the first 10 even numbers.

A. 12

B. 11

C. 10

D. 11.5

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Correct Answer: Option B

Explanation:
Sum of first 10 even numbers = 10×11=110 (since sum = n(n+1) for first n evens? Actually sum = 2+4+...+20 = 2*(1+2+...+10)=2*55=110). Average=110/10=11.

This question belongs to: Maths Average

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