Average of 8 numbers 1250. If average of 5 is 1245, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 1250. If average of 5 is 1245, average of remaining 3?

A. 1258.33

B. 1257

C. 1255

D. 1260

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum8=10000. Sum5=6225. Remaining=3775. Average≈1258.33.

This question belongs to: Maths Average

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Question #1

Average of 12 numbers 720. If average of 8 is 715, average of remaining 4?

A. 730

B. 732

C. 725

D. 728

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Correct Answer: Option A

Explanation:
Sum12=8640. Sum8=5720. Remaining=2920. Average=730.

This question belongs to: Maths Average

Question #2

Average of multiples of 8 from 8 to 64 is

A. 36

B. 30

C. 32

D. 40

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Correct Answer: Option A

Explanation:
(8+64)/2=36.

This question belongs to: Maths Average

Question #3

The average marks of 12 students is 72. If one student scored 84 marks, what is the total marks of the remaining students?

A. 744

B. 780

C. 768

D. 720

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Correct Answer: Option B

Explanation:
Total marks = 12×72 = 864. Remaining students' marks = 864−84 = 780.

This question belongs to: Maths Average

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