The average score of 40 matches is 50. If average of first 20 is 45, average of last 20? MCQ with Answer and Explanation

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The average score of 40 matches is 50. If average of first 20 is 45, average of last 20?

A. 50

B. 48

C. 55

D. 52

Answer: Option C

Solution (By JKSSB Mock Tests)

Total=2000. First=900. Last=1100. Average=55.

This question belongs to: Maths Average

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Question #1

The average of 270,360,450 is

A. 370

B. 355

C. 360

D. 350

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Correct Answer: Option C

Explanation:
1080/3=360.

This question belongs to: Maths Average

Question #2

The average of 7 numbers is 28. If one number is 40, find the average of the remaining 6.

A. 24

B. 25

C. 27

D. 26

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Correct Answer: Option D

Explanation:
Sum=7×28=196. Remaining sum=196-40=156. Average=156/6=26.

This question belongs to: Maths Average

Question #3

Average of 12 numbers 570. If average of 8 is 565, average of remaining 4?

A. 580

B. 582

C. 578

D. 575

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Correct Answer: Option A

Explanation:
Sum12=6840. Sum8=4520. Remaining=2320. Average=580.

This question belongs to: Maths Average

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