If average of 8 and 12 is 10, average of 12 and 18 is 15, average of 8,12,18 is MCQ with Answer and Explanation

Question

Share Report Error

If average of 8 and 12 is 10, average of 12 and 18 is 15, average of 8,12,18 is

A. 14

B. 12.67

C. 13

D. 12

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=38. Average=38/3≈12.67.

This question belongs to: Maths Average

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Average Questions

Question #1

Share Report

What is the average of all numbers from 1 to 50 that are divisible by 7?

A. 27.5

B. 28

C. 28.5

D. 29

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Numbers: 7,14,21,28,35,42,49. Sum=196, count=7, avg=28.

This question belongs to: Maths Average

Question #2

Share Report

Average of 15 numbers 1410. If average of 9 is 1405, average of remaining 6?

A. 1418

B. 1420

C. 1417.5

D. 1415

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Sum15=21150. Sum9=12645. Remaining=8505. Average=1417.5.

This question belongs to: Maths Average

Question #3

Share Report

The average of 12 numbers is 40. Later average becomes 42 when two numbers are changed. The difference in sum?

A. 28

B. 30

C. 24

D. 20

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Increase in average 2, for 12 =24 increase in sum.

This question belongs to: Maths Average

Explore All Average MCQs