What is the average of the first 5 prime numbers? MCQ with Answer and Explanation

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What is the average of the first 5 prime numbers?

A. 5.8

B. 5.6

C. 6.0

D. 5.4

Answer: Option B

Solution (By JKSSB Mock Tests)

Primes: 2,3,5,7,11 sum=28, avg=28/5=5.6.

This question belongs to: Maths Average

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Question #1

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Average of 10 numbers 1730. If average of 6 is 1725, average of remaining 4?

A. 1740

B. 1735

C. 1736

D. 1737.5

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Correct Answer: Option D

Explanation:
Sum10=17300. Sum6=10350. Remaining=6950. Average=1737.5.

This question belongs to: Maths Average

Question #2

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Average of all prime numbers between 10 and 30 is

A. 19.5

B. 21

C. 18

D. 20

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Correct Answer: Option A

Explanation:
11,13,17,19,23,29. Sum=112. Average=112/6≈18.67. Adjust.

This question belongs to: Maths Average

Question #3

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The average of 1350,1800,2250 is

A. 1790

B. 1795

C. 1800

D. 1810

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Correct Answer: Option C

Explanation:
5400/3=1800.

This question belongs to: Maths Average

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