If average of 15 numbers is 40 and average of 10 is 45, average of remaining 5? MCQ with Answer and Explanation

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If average of 15 numbers is 40 and average of 10 is 45, average of remaining 5?

A. 30

B. 32

C. 35

D. 25

Answer: Option A

Solution (By JKExamLibrary)

Sum15=600. Sum10=450. Remaining=150. Average=30.

This question belongs to: Maths Average

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Question #1 Report Error

Average speed to cover a distance in two equal parts at speeds x and y is

A. (x+y)/2

B. xy/(x+y)

C. 2xy/(x+y)

D. x+y

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Correct Answer: Option C

Explanation:
Harmonic mean for equal distances.

This question belongs to: Maths Average

Question #2 Report Error

The average of 5 consecutive even numbers is 28. Smallest number?

A. 26

B. 20

C. 24

D. 22

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Correct Answer: Option C

Explanation:
Average middle=28. Smallest =28-4=24.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 1140. If average of 6 is 1135, average of remaining 3?

A. 1148

B. 1145

C. 1155

D. 1150

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Correct Answer: Option D

Explanation:
Sum9=10260. Sum6=6810. Remaining=3450. Average=1150.

This question belongs to: Maths Average

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