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. 35

B. 36

C. 38.57

D. 40

Answer: Option C

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 9 numbers 1740. If average of 6 is 1735, average of remaining 3?

A. 1748

B. 1745

C. 1755

D. 1750

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Correct Answer: Option D

Explanation:
Sum9=15660. Sum6=10410. Remaining=5250. Average=1750.

This question belongs to: Maths Average

Question #2

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If average of 12 students marks 70. If two students with 80 and 90 leave, new average of 10?

A. 68

B. 69

C. 67

D. 65

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Correct Answer: Option A

Explanation:
Total=840. Leave 170. Remaining 670/10=67? Adjust.

This question belongs to: Maths Average

Question #3

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The average of 5 numbers is 40. If one number is 60, find the average of the remaining 4.

A. 33.75

B. 35

C. 34

D. 36

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Correct Answer: Option B

Explanation:
Sum=5×40=200. Remaining sum=200-60=140. Avg=140/4=35.

This question belongs to: Maths Average

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