The average of 3 numbers is 28. If two numbers are 25 and 30, find the third. MCQ with Answer and Explanation

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The average of 3 numbers is 28. If two numbers are 25 and 30, find the third.

A. 27

B. 31

C. 29

D. 26

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum=3×28=84. Third =84-25-30=29.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 1030. If average of 6 is 1025, average of remaining 4?

A. 1040

B. 1036

C. 1035

D. 1037.5

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Correct Answer: Option D

Explanation:
Sum10=10300. Sum6=6150. Remaining=4150. Average=1037.5.

This question belongs to: Maths Average

Question #2

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

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Correct Answer: Option B

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

This question belongs to: Maths Average

Question #3

The average of 5 numbers is 36. If one number is 42, find the average of the remaining 4.

A. 34.5

B. 34

C. 35

D. 33.75

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Correct Answer: Option A

Explanation:
Sum=5×36=180. Remaining sum=180-42=138. Avg=138/4=34.5.

This question belongs to: Maths Average

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