The average of 6 numbers is 17. If one number is 20, find the average of the remaining 5. MCQ with Answer and Explanation

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The average of 6 numbers is 17. If one number is 20, find the average of the remaining 5.

A. 17.0

B. 16.4

C. 16.6

D. 16.8

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=6×17=102. Remaining sum=102-20=82. Avg=82/5=16.4.

This question belongs to: Maths Average

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Question #1

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The average weight of 20 students is 50 kg. If the teacher's weight is added, the average becomes 52 kg. Find the teacher's weight.

A. 88 kg

B. 94 kg

C. 90 kg

D. 92 kg

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Correct Answer: Option D

Explanation:
Total weight of 20 = 20×50=1000. Total of 21 =21×52=1092. Teacher's weight =1092-1000=92.

This question belongs to: Maths Average

Question #2

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The average of all numbers from 1 to 60 divisible by 5 is

A. 32.5

B. 30

C. 35

D. 25

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Correct Answer: Option A

Explanation:
5 to 60. 12 numbers. Average 5*(1+12)/2=32.5.

This question belongs to: Maths Average

Question #3

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Average of 40,60,80,100 is

A. 70

B. 72

C. 65

D. 75

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Correct Answer: Option A

Explanation:
280/4=70.

This question belongs to: Maths Average

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