Average of 18 numbers 60. If 6 numbers average 70, average of remaining 12? MCQ with Answer and Explanation

Average of 18 numbers 60. If 6 numbers average 70, average of remaining 12?

A. 56

B. 55

C. 58

D. 50

Answer: Option B

Total=1080. 6=420. Remaining=660/12=55.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 5 numbers is 30. If average of first 3 is 28, average of last 3 is 32, then the 3rd number is

A. 32

B. 31

C. 28

D. 30

Correct Answer: Option D

Explanation:
Sum5=150. Sum1-3=84. Sum3-5=96. 3rd =84 +96 -150=30.

This question belongs to: Maths Average

Question #2 Report Error

Average of 20, 40, 60, 80 is

A. 50

B. 55

C. 45

D. 60

Correct Answer: Option A

Explanation:
Sum=200. Average=50.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 440. If average of 6 is 435, average of remaining 3?

A. 455

B. 445

C. 450

D. 448

Correct Answer: Option C

Explanation:
Sum9=3960. Sum6=2610. Remaining=1350. Average=450.

This question belongs to: Maths Average