What is the average of the first 7 multiples of 5? MCQ with Answer and Explanation

What is the average of the first 7 multiples of 5?

A. 30

B. 15

C. 20

D. 25

Answer: Option C

Multiples: 5,10,15,20,25,30,35 sum=140, count=7, avg=20.

This question belongs to: Maths Average

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Question #1 Report Error

If average of 12 students marks 70. If two students with 80 and 90 leave, new average of 10?

A. 68

B. 69

C. 65

D. 67

Correct Answer: Option A

Explanation:
Total=840. Leave 170. Remaining 670/10=67? Adjust.

This question belongs to: Maths Average

Question #2 Report Error

Average of 6 numbers 45. If average of 4 is 40, average of remaining 2?

A. 55

B. 50

C. 52.5

D. 60

Correct Answer: Option A

Explanation:
Sum6=270. Sum4=160. Remaining=110. Average=55.

This question belongs to: Maths Average

Question #3 Report Error

Average of 12 numbers 820. If average of 8 is 815, average of remaining 4?

A. 828

B. 832

C. 830

D. 825

Correct Answer: Option C

Explanation:
Sum12=9840. Sum8=6520. Remaining=3320. Average=830.

This question belongs to: Maths Average