The average of 80,90,100 is MCQ with Answer and Explanation

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The average of 80,90,100 is

A. 85

B. 95

C. 90

D. 88

Answer: Option C

Solution (By JKSSB Mock Tests)

270/3=90.

This question belongs to: Maths Average

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Question #1

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Average of 50 and 60 is 55, average of 60 and 70 is 65, average of 50,60,70 is

A. 58.33

B. 60

C. 59

D. 61

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Correct Answer: Option B

Explanation:
Sum=180. Average=60.

This question belongs to: Maths Average

Question #2

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Average of 15 numbers 1310. If average of 9 is 1305, average of remaining 6?

A. 1317.5

B. 1315

C. 1318

D. 1320

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Correct Answer: Option A

Explanation:
Sum15=19650. Sum9=11745. Remaining=7905. Average=1317.5.

This question belongs to: Maths Average

Question #3

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The average of 5 numbers is 42. If two numbers are 38 and 44, find the average of the remaining three.

A. 43

B. 42.67

C. 41.33

D. 42

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Correct Answer: Option B

Explanation:
Sum=5×42=210. Sum of two=38+44=82. Sum of three=128. Avg=128/3=42.67.

This question belongs to: Maths Average

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