Average of 12 numbers 2120. If average of 8 is 2115, average of remaining 4? MCQ with Answer and Explanation

Average of 12 numbers 2120. If average of 8 is 2115, average of remaining 4?

A. 2132

B. 2128

C. 2130

D. 2125

Answer: Option C

Sum12=25440. Sum8=16920. Remaining=8520. Average=2130.

This question belongs to: Maths Average

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Question #1 Report Error

The average marks of 25 students is 70. If the marks of one student were misread as 80 instead of 60, find the correct average.

A. 69.8

B. 68.8

C. 70.0

D. 69.2

Correct Answer: Option D

Explanation:
Total sum misread =25×70=1750. Correct sum =1750 -80 +60 =1730. Correct average =1730/25=69.2.

This question belongs to: Maths Average

Question #2 Report Error

Average of 12 numbers 1970. If average of 8 is 1965, average of remaining 4?

A. 1980

B. 1975

C. 1982

D. 1978

Correct Answer: Option A

Explanation:
Sum12=23640. Sum8=15720. Remaining=7920. Average=1980.

This question belongs to: Maths Average

Question #3 Report Error

The average of 120,160,200 is

A. 150

B. 160

C. 170

D. 155

Correct Answer: Option B

Explanation:
480/3=160.

This question belongs to: Maths Average