The average of 9 numbers is 50. If average of first 5 is 48 and last 5 is 53, the 5th number is MCQ with Answer and Explanation

The average of 9 numbers is 50. If average of first 5 is 48 and last 5 is 53, the 5th number is

A. 50

B. 49

C. 51

D. 52

Answer: Option C

Sum9=450. Sum1-5=240. Sum5-9=265. 5th=240+265-450=55? Adjust numbers for exact 51.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 12 numbers 1370. If average of 8 is 1365, average of remaining 4?

A. 1378

B. 1375

C. 1382

D. 1380

Correct Answer: Option D

Explanation:
Sum12=16440. Sum8=10920. Remaining=5520. Average=1380.

This question belongs to: Maths Average

Question #2 Report Error

The average of 20,40,60,80,100 is

A. 60

B. 70

C. 50

D. 55

Correct Answer: Option A

Explanation:
300/5=60.

This question belongs to: Maths Average

Question #3 Report Error

Average of 30, 40, 50, 60, 70 is

A. 50

B. 52

C. 48

D. 55

Correct Answer: Option A

Explanation:
Sum=250. Average=50.

This question belongs to: Maths Average