Average of 5 numbers is 30. If average of first 3 is 28, average of last 3 is 32, then the 3rd number is MCQ with Answer and Explanation

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Average of 5 numbers is 30. If average of first 3 is 28, average of last 3 is 32, then the 3rd number is

A. 31

B. 28

C. 30

D. 32

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum5=150. Sum1-3=84. Sum3-5=96. 3rd =84 +96 -150=30.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Average of 20, 40, 60, 80 is

A. 60

B. 55

C. 50

D. 45

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Correct Answer: Option C

Explanation:
Sum=200. Average=50.

This question belongs to: Maths Average

Question #2

Average of 12 numbers 820. If average of 8 is 815, average of remaining 4?

A. 825

B. 832

C. 828

D. 830

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Correct Answer: Option D

Explanation:
Sum12=9840. Sum8=6520. Remaining=3320. Average=830.

This question belongs to: Maths Average

Question #3

Average of 12 numbers 1420. If average of 8 is 1415, average of remaining 4?

A. 1432

B. 1425

C. 1428

D. 1430

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Correct Answer: Option D

Explanation:
Sum12=17040. Sum8=11320. Remaining=5720. Average=1430.

This question belongs to: Maths Average

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