Average of 8 numbers 2450. If average of 5 is 2445, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 2450. If average of 5 is 2445, average of remaining 3?

A. 2457

B. 2460

C. 2455

D. 2458.33

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum8=19600. Sum5=12225. Remaining=7375. Average≈2458.33.

This question belongs to: Maths Average

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Question #1

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Average of 25 numbers 40. If average of first 13 is 38, average of last 13 is 42, what is the 13th number?

A. 39

B. 42

C. 40

D. 38

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Correct Answer: Option C

Explanation:
Sum25=1000. Sum1-13=494. Sum13-25=546. 13th=494+546-1000=40.

This question belongs to: Maths Average

Question #2

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Average of 10 numbers 2430. If average of 6 is 2425, average of remaining 4?

A. 2437.5

B. 2440

C. 2435

D. 2436

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Correct Answer: Option A

Explanation:
Sum10=24300. Sum6=14550. Remaining=9750. Average=2437.5.

This question belongs to: Maths Average

Question #3

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The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight?

A. 75

B. 80

C. 74

D. 76

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Correct Answer: Option D

Explanation:
Total students weight=1250. New total for 26=26×51=1326. Teacher=1326-1250=76 kg.

This question belongs to: Maths Average

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