Average of 15 numbers 2260. If average of 9 is 2255, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2260. If average of 9 is 2255, average of remaining 6?

A. 2268

B. 2265

C. 2270

D. 2267.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum15=33900. Sum9=20295. Remaining=13605. Average=2267.5.

This question belongs to: Maths Average

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Question #1

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The average of 7 numbers is 20. If average of first 4 is 18, last 3 is 23, what is average of 4th and 5th?

A. 21

B. 20

C. 22

D. 19

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Correct Answer: Option B

Explanation:
Sum7=140. Sum1-4=72. Sum5-7=69. Sum4+5 =140 - (sum1-3 +sum6-7). Use other. Adjust.

This question belongs to: Maths Average

Question #2

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Average of 735,980,1225 is

A. 975

B. 970

C. 980

D. 990

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Correct Answer: Option C

Explanation:
2940/3=980.

This question belongs to: Maths Average

Question #3

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The average of 10, 20, 30 is 20, average of 30,40,50 is 40, average of 10,20,30,40,50 is

A. 28

B. 32

C. 30

D. 35

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Correct Answer: Option C

Explanation:
Sum=150. Average=30.

This question belongs to: Maths Average

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