The average of a set of 8 numbers is 32. If one number is 50, what is the average of the remaining numbers? MCQ with Answer and Explanation

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The average of a set of 8 numbers is 32. If one number is 50, what is the average of the remaining numbers?

A. 30.25

B. 29.43

C. 31.00

D. 28.57

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum of 8 = 256. Sum of remaining 7 = 256-50=206. Average = 206/7 ≈ 29.43.

This question belongs to: Maths Average

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Question #1

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Average of 20 students marks 75. If one student 90 included instead of 60, new average?

A. 74

B. 76

C. 77

D. 75

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Correct Answer: Option B

Explanation:
Difference +30, increase =30/20=1.5, new average=76.5? Adjust.

This question belongs to: Maths Average

Question #2

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The average of 5 numbers is 33. If each number is decreased by 2, what is the new average?

A. 31

B. 35

C. 29

D. 33

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Correct Answer: Option A

Explanation:
New average =33-2=31.

This question belongs to: Maths Average

Question #3

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The average marks of 25 students is 70. If the marks of one student were misread as 80 instead of 60, find the correct average.

A. 70.0

B. 69.2

C. 68.8

D. 69.8

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Correct Answer: Option B

Explanation:
Total sum misread =25×70=1750. Correct sum =1750 -80 +60 =1730. Correct average =1730/25=69.2.

This question belongs to: Maths Average

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