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

The average of 80,90,100 is

A. 88

B. 85

C. 95

D. 90

Answer: Option D

270/3=90.

This question belongs to: Maths Average

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Question #1 Report Error

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. 94 kg

B. 90 kg

C. 88 kg

D. 92 kg

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 Report Error

Find average of 11,22,33,...,99.

A. 45

B. 60

C. 50

D. 55

Correct Answer: Option D

Explanation:
11 times (1 to 9). Average 11×5=55.

This question belongs to: Maths Average

Question #3 Report Error

Average of 15 numbers 860. If average of 9 is 855, average of remaining 6?

A. 867.5

B. 870

C. 865

D. 868

Correct Answer: Option A

Explanation:
Sum15=12900. Sum9=7695. Remaining=5205. Average=867.5.

This question belongs to: Maths Average