Average of 12 numbers 1470. If average of 8 is 1465, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1470. If average of 8 is 1465, average of remaining 4?

A. 1475

B. 1480

C. 1482

D. 1478

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum12=17640. Sum8=11720. Remaining=5920. Average=1480.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 1160. If average of 9 is 1155, average of remaining 6?

A. 1167.5

B. 1165

C. 1170

D. 1168

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Correct Answer: Option A

Explanation:
Sum15=17400. Sum9=10395. Remaining=7005. Average=1167.5.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 2100. If average of 5 is 2095, average of remaining 3?

A. 2107

B. 2110

C. 2108.33

D. 2105

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Correct Answer: Option C

Explanation:
Sum8=16800. Sum5=10475. Remaining=6325. Average≈2108.33.

This question belongs to: Maths Average

Question #3

The average weight of 20 students is 50 kg. If the teacher's weight is added, the average becomes 52 kg. Find the teacher's weight.

A. 92 kg

B. 90 kg

C. 88 kg

D. 94 kg

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Correct Answer: Option A

Explanation:
Total weight of 20 = 20×50=1000. Total of 21 =21×52=1092. Teacher's weight =1092-1000=92.

This question belongs to: Maths Average

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