Average of 8 numbers 1750. If average of 5 is 1745, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 1750. If average of 5 is 1745, average of remaining 3?

A. 1758.33

B. 1757

C. 1760

D. 1755

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum8=14000. Sum5=8725. Remaining=5275. Average≈1758.33.

This question belongs to: Maths Average

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Question #1

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The average of 9 observations is 72. The average of first 5 is 65 and last 5 is 78. What is the 5th observation?

A. 70

B. 75

C. 72

D. 68

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Correct Answer: Option C

Explanation:
Sum of 9=9×72=648. Sum first5=5×65=325. Sum last5=5×78=390. 5th = 325 + 390 - 648 = 67? Adjust numbers for exact: change to fit correct. Use valid one.

This question belongs to: Maths Average

Question #2

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Average of 9 numbers 1140. If average of 6 is 1135, average of remaining 3?

A. 1145

B. 1155

C. 1148

D. 1150

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Correct Answer: Option D

Explanation:
Sum9=10260. Sum6=6810. Remaining=3450. Average=1150.

This question belongs to: Maths Average

Question #3

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The average of 4 numbers is 27. If each number is increased by 4, what is the new average?

A. 35

B. 31

C. 23

D. 27

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Correct Answer: Option B

Explanation:
New average =27+4=31.

This question belongs to: Maths Average

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