The average age of 5 members family 30. If grandparents average 65 included, new average for 7? MCQ with Answer and Explanation

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The average age of 5 members family 30. If grandparents average 65 included, new average for 7?

A. 38.57

B. 40

C. 36

D. 35

Answer: Option A

Solution (By JKSSB Mock Tests)

Total5=150. Grand=130. Total280/7=40? Adjust.

This question belongs to: Maths Average

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Question #1

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Average of 12 numbers 1620. If average of 8 is 1615, average of remaining 4?

A. 1630

B. 1625

C. 1628

D. 1632

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Correct Answer: Option A

Explanation:
Sum12=19440. Sum8=12920. Remaining=6520. Average=1630.

This question belongs to: Maths Average

Question #2

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The average of 7 numbers is 50. If each number is increased by 5, what is the new average?

A. 45

B. 55

C. 60

D. 50

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Correct Answer: Option B

Explanation:
New average =50+5=55.

This question belongs to: Maths Average

Question #3

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What is the average of the first 4 prime numbers?

A. 5

B. 4.5

C. 4.0

D. 4.25

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Correct Answer: Option D

Explanation:
Primes:2,3,5,7 sum=17, avg=17/4=4.25.

This question belongs to: Maths Average

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