The average of 8 numbers is 50. If one number 70 is replaced by 54, what is the new average? MCQ with Answer and Explanation

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The average of 8 numbers is 50. If one number 70 is replaced by 54, what is the new average?

A. 49

B. 48

C. 50

D. 52

Answer: Option B

Solution (By JKSSB Mock Tests)

Original total = 8×50 = 400. New total = 400−70+54 = 384. New average = 384/8 = 48.

This question belongs to: Maths Average

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Question #1

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The average of 7 numbers is 18. If one number is 24, what is the average of the remaining 6 numbers?

A. 18

B. 19

C. 17

D. 16

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Correct Answer: Option C

Explanation:
Total = 7×18 = 126. Remaining total = 126−24 = 102. Average = 102/6 = 17.

This question belongs to: Maths Average

Question #2

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Average of 9 numbers 65. If average of 6 is 60, average of remaining 3?

A. 70

B. 72

C. 80

D. 75

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Correct Answer: Option D

Explanation:
Sum9=585. Sum6=360. Remaining=225. Average=75.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 2480. If average of 6 is 2475, average of remaining 4?

A. 2486

B. 2485

C. 2490

D. 2487.5

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Correct Answer: Option D

Explanation:
Sum10=24800. Sum6=14850. Remaining=9950. Average=2487.5.

This question belongs to: Maths Average

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