The average of 3 numbers is 24. If one number is 12 and another is 30, find the third. MCQ with Answer and Explanation

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The average of 3 numbers is 24. If one number is 12 and another is 30, find the third.

A. 30

B. 24

C. 18

D. 36

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=3×24=72. Third =72-12-30=30.

This question belongs to: Maths Average

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Question #1

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The average of 4 numbers is 16. If one number is 24, find the average of the other three.

A. 12

B. 14

C. 13

D. 13.33

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Correct Answer: Option D

Explanation:
Sum=4×16=64. Other sum=64-24=40. Avg=40/3=13.33.

This question belongs to: Maths Average

Question #2

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Average of 15 numbers 410. If average of 9 is 405, average of remaining 6?

A. 415

B. 418

C. 420

D. 417.5

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Correct Answer: Option D

Explanation:
Sum15=6150. Sum9=3645. Remaining=2505. Average=417.5.

This question belongs to: Maths Average

Question #3

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Average of 9 numbers 1240. If average of 6 is 1235, average of remaining 3?

A. 1248

B. 1255

C. 1245

D. 1250

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Correct Answer: Option D

Explanation:
Sum9=11160. Sum6=7410. Remaining=3750. Average=1250.

This question belongs to: Maths Average

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