Average of 12 numbers 1870. If average of 8 is 1865, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1870. If average of 8 is 1865, average of remaining 4?

A. 1875

B. 1882

C. 1878

D. 1880

Answer: Option D

Solution (By JKExamLibrary)

Sum12=22440. Sum8=14920. Remaining=7520. Average=1880.

This question belongs to: Maths Average

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Question #1 Report Error

If average of 5 consecutive multiples of 4 is 32, what is the largest?

A. 48

B. 40

C. 36

D. 44

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Correct Answer: Option B

Explanation:
Numbers 20,24,28,32,36 avg 28 no. 24,28,32,36,40 avg 32. Largest 40.

This question belongs to: Maths Average

Question #2 Report Error

The average of 6 numbers is 12. If one number is 20, find the average of the rest.

A. 10

B. 11

C. 10.4

D. 9.6

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Correct Answer: Option C

Explanation:
Sum=6×12=72. Rest sum=72-20=52. Average=52/5=10.4.

This question belongs to: Maths Average

Question #3 Report Error

Average of 15 numbers 28. If one number 40 is replaced by 25, new average?

A. 26.67

B. 27

C. 27.5

D. 28

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Correct Answer: Option B

Explanation:
Change -15, decrease 1. New=27.

This question belongs to: Maths Average

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