Average of 30 numbers 20. If each decreased by 4, new average? MCQ with Answer and Explanation

Average of 30 numbers 20. If each decreased by 4, new average?

A. 18

B. 24

C. 16

D. 20

Answer: Option C

16.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 4 numbers is 30. If the numbers are in the ratio 1:2:3:4, find the largest number.

A. 48

B. 24

C. 36

D. 60

Correct Answer: Option A

Explanation:
Sum = 4×30=120. Ratio sum =1+2+3+4=10. Largest = (4/10)×120=48.

This question belongs to: Maths Average

Question #2 Report Error

What is the average of the first 6 multiples of 2?

A. 7

B. 6

C. 8

D. 9

Correct Answer: Option A

Explanation:
Multiples:2,4,6,8,10,12 sum=42, count=6, avg=7.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers 930. If average of 6 is 925, average of remaining 4?

A. 940

B. 935

C. 937.5

D. 936

Correct Answer: Option C

Explanation:
Sum10=9300. Sum6=5550. Remaining=3750. Average=937.5.

This question belongs to: Maths Average