Average of 15 numbers 1510. If average of 9 is 1505, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 1510. If average of 9 is 1505, average of remaining 6?

A. 1517.5

B. 1515

C. 1520

D. 1518

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum15=22650. Sum9=13545. Remaining=9105. Average=1517.5.

This question belongs to: Maths Average

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Question #1

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A shopkeeper sold 12 pens at Rs. 15 each. Average selling price of all pens if he sold 8 more at Rs. 12 each?

A. 13.5

B. 14

C. 13

D. 13.8

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Correct Answer: Option D

Explanation:
Total revenue = 12×15 + 8×12 = 180 + 96 = 276. Total pens=20. Average=276/20=13.8.

This question belongs to: Maths Average

Question #2

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The average of first 8 multiples of 5 is

A. 22.5

B. 25

C. 30

D. 20

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Correct Answer: Option A

Explanation:
5*(1+8)/2=22.5.

This question belongs to: Maths Average

Question #3

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Average of 8 numbers 850. If average of 5 is 845, average of remaining 3?

A. 857

B. 858.33

C. 860

D. 855

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Correct Answer: Option B

Explanation:
Sum8=6800. Sum5=4225. Remaining=2575. Average≈858.33.

This question belongs to: Maths Average

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