Average weight of 20 girls 45 kg. If 5 boys average 55 kg included, new average for 25? MCQ with Answer and Explanation

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Average weight of 20 girls 45 kg. If 5 boys average 55 kg included, new average for 25?

A. 50

B. 46

C. 47

D. 48

Answer: Option C

Solution (By JKSSB Mock Tests)

Girls 900. Boys 275. Total 1175/25=47.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 50. If average of 10 is 55, average of remaining 5?

A. 40

B. 42

C. 45

D. 35

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Correct Answer: Option A

Explanation:
Sum15=750. Sum10=550. Remaining=200. Average=40.

This question belongs to: Maths Average

Question #2

Average of 9 numbers is 28. If average of first 5 is 25, average of last 5 is 31, 5th number?

A. 26

B. 29

C. 27

D. 28

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Correct Answer: Option D

Explanation:
Sum9=252. Sum1-5=125. Sum5-9=155. 5th=125+155-252=28.

This question belongs to: Maths Average

Question #3

The average of all even numbers from 2 to 40 is

A. 19

B. 22

C. 20

D. 21

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Correct Answer: Option D

Explanation:
(2+40)/2=21.

This question belongs to: Maths Average

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