The average of first 6 multiples of 7 is MCQ with Answer and Explanation

The average of first 6 multiples of 7 is

A. 28

B. 21

C. 24.5

D. 25

Answer: Option C

7*(1+6)/2=7*3.5=24.5.

This question belongs to: Maths Average

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Question #1 Report Error

The average marks of boys in a class is 60 and that of girls is 70. If there are 20 boys and 30 girls, the average marks of the whole class is:

A. 66

B. 64

C. 68

D. 65

Correct Answer: Option A

Explanation:
Combined average = (20×60 + 30×70)/50 = 3300/50 = 66.

This question belongs to: Maths Average

Question #2 Report Error

Average of 10 to 50 is

A. 29

B. 30

C. 31

D. 32

Correct Answer: Option B

Explanation:
(10+50)/2=30.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 340. If average of 6 is 335, average of remaining 3?

A. 355

B. 345

C. 350

D. 348

Correct Answer: Option C

Explanation:
Sum9=3060. Sum6=2010. Remaining=1050. Average=350.

This question belongs to: Maths Average