Average of a,b is 10, average of b,c is 12, average of c,a is 14. Find a. MCQ with Answer and Explanation

Average of a,b is 10, average of b,c is 12, average of c,a is 14. Find a.

A. 8

B. 10

C. 12

D. 14

Answer: Option C

a+b=20, b+c=24, c+a=28. Add all 2(a+b+c)=72, a+b+c=36. a=36-24=12.

This question belongs to: Maths Average

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Question #1 Report Error

The average of a set of 8 numbers is 32. If one number is 50, what is the average of the remaining numbers?

A. 31.00

B. 30.25

C. 28.57

D. 29.43

Correct Answer: Option D

Explanation:
Sum of 8 = 256. Sum of remaining 7 = 256-50=206. Average = 206/7 ≈ 29.43.

This question belongs to: Maths Average

Question #2 Report Error

Average of 15 numbers 2110. If average of 9 is 2105, average of remaining 6?

A. 2120

B. 2115

C. 2118

D. 2117.5

Correct Answer: Option D

Explanation:
Sum15=31650. Sum9=18945. Remaining=12705. Average=2117.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 1740. If average of 6 is 1735, average of remaining 3?

A. 1748

B. 1745

C. 1750

D. 1755

Correct Answer: Option C

Explanation:
Sum9=15660. Sum6=10410. Remaining=5250. Average=1750.

This question belongs to: Maths Average