Average of 15 numbers 310. If average of 9 is 305, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 310. If average of 9 is 305, average of remaining 6?

A. 315

B. 318

C. 320

D. 317.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum15=4650. Sum9=2745. Remaining=1905. Average=317.5.

This question belongs to: Maths Average

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Question #1

The average of 1 to 30 is

A. 15.5

B. 15

C. 14.5

D. 16

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Correct Answer: Option A

Explanation:
(30+1)/2=15.5.

This question belongs to: Maths Average

Question #2

Average of 15 numbers 1210. If average of 9 is 1205, average of remaining 6?

A. 1218

B. 1217.5

C. 1220

D. 1215

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Correct Answer: Option B

Explanation:
Sum15=18150. Sum9=10845. Remaining=7305. Average=1217.5.

This question belongs to: Maths Average

Question #3

Average of 8 numbers 1400. If average of 5 is 1395, average of remaining 3?

A. 1408.33

B. 1405

C. 1407

D. 1410

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Correct Answer: Option A

Explanation:
Sum8=11200. Sum5=6975. Remaining=4225. Average≈1408.33.

This question belongs to: Maths Average

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