Average of 21,42,63 is MCQ with Answer and Explanation

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Average of 21,42,63 is

A. 42

B. 35

C. 40

D. 45

Answer: Option A

Solution (By JKSSB Mock Tests)

126/3=42.

This question belongs to: Maths Average

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Question #1

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Average of 10 numbers 930. If average of 6 is 925, average of remaining 4?

A. 937.5

B. 936

C. 935

D. 940

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Correct Answer: Option A

Explanation:
Sum10=9300. Sum6=5550. Remaining=3750. Average=937.5.

This question belongs to: Maths Average

Question #2

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Average salary of 20 employees Rs. 8000. If manager Rs. 20000 included, new average?

A. 8800

B. 8200

C. 8500

D. 9000

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Correct Answer: Option C

Explanation:
Total=160000. New total=180000. /21≈8571 approx 8500.

This question belongs to: Maths Average

Question #3

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If the average of 12 numbers is 30 and average of 8 is 35, average of remaining 4 is

A. 25

B. 18

C. 22.5

D. 20

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Correct Answer: Option D

Explanation:
Sum12=360. Sum8=280. Remaining sum=80. Average=20.

This question belongs to: Maths Average

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