Average of 100 numbers is 50. If 98 is replaced by 52, new average? MCQ with Answer and Explanation

Average of 100 numbers is 50. If 98 is replaced by 52, new average?

A. 48

B. 49.46

C. 49

D. 50

Answer: Option B

Change -46. Decrease 46/100=0.46. New 49.54 approx.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 6 numbers is 30. If each number is multiplied by 1.5, what is the new average?

A. 60

B. 45

C. 22.5

D. 30

Correct Answer: Option B

Explanation:
New average =30×1.5=45.

This question belongs to: Maths Average

Question #2 Report Error

Average of 885,1180,1475 is

A. 1170

B. 1175

C. 1190

D. 1180

Correct Answer: Option D

Explanation:
3540/3=1180.

This question belongs to: Maths Average

Question #3 Report Error

If average of x numbers is y and average of z numbers is w, combined average is

A. (x y + z w)/(x+z)

B. (x + z) y / (x + z)

C. (y + w)/2

D. x y + z w

Correct Answer: Option A

Explanation:
Weighted average formula: (x*y + z*w) / (x + z).

This question belongs to: Maths Average