Average of 12 numbers 38. If average of 9 is 35, average of remaining 3? MCQ with Answer and Explanation

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Average of 12 numbers 38. If average of 9 is 35, average of remaining 3?

A. 50

B. 45

C. 47

D. 48

Answer: Option C

Solution (By JKExamLibrary)

Sum12=456. Sum9=315. Remaining=141. Average=47.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 9 numbers 1890. If average of 6 is 1885, average of remaining 3?

A. 1905

B. 1898

C. 1895

D. 1900

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Correct Answer: Option D

Explanation:
Sum9=17010. Sum6=11310. Remaining=5700. Average=1900.

This question belongs to: Maths Average

Question #2 Report Error

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

A. 1875

B. 1880

C. 1882

D. 1878

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Correct Answer: Option B

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

This question belongs to: Maths Average

Question #3 Report Error

The average marks of boys in a class is 60 and that of girls is 70. If there are 20 boys and 30 girls, the average marks of the whole class is:

A. 66

B. 64

C. 68

D. 65

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Correct Answer: Option A

Explanation:
Combined average = (20×60 + 30×70)/50 = 3300/50 = 66.

This question belongs to: Maths Average

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