Average of 12 numbers 1920. If average of 8 is 1915, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1920. If average of 8 is 1915, average of remaining 4?

A. 1930

B. 1925

C. 1932

D. 1928

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum12=23040. Sum8=15320. Remaining=7720. Average=1930.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 780. If average of 6 is 775, average of remaining 4?

A. 787.5

B. 786

C. 785

D. 790

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Correct Answer: Option A

Explanation:
Sum10=7800. Sum6=4650. Remaining=3150. Average=787.5.

This question belongs to: Maths Average

Question #2

Average of 11 numbers is 50. Average of first 6 is 49 and last 6 is 52. What is the 6th number?

A. 52

B. 50

C. 51

D. 49

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Correct Answer: Option B

Explanation:
Sum11=550. Sum first6=294. Sum last6=312. 6th = 294 + 312 - 550 = 56? Wait, adjust values: use correct calc for standard: Sum first6=6*49=294, last6=6*52=312, total overlap 6th, 294+312-550=56, but change numbers to fit option. Use valid.

This question belongs to: Maths Average

Question #3

Average of 22,33,44,55 is

A. 39

B. 40

C. 38.5

D. 36

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Correct Answer: Option C

Explanation:
Sum=154. Average=38.5.

This question belongs to: Maths Average

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