The average marks of 30 students is 60. If the marks of 10 students are averaged 50, what is the average of the remaining 20 students? MCQ with Answer and Explanation

Question

The average marks of 30 students is 60. If the marks of 10 students are averaged 50, what is the average of the remaining 20 students?

A. 67.5

B. 60

C. 65

D. 62.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Total sum =30×60=1800. Sum of 10 =10×50=500. Sum of remaining 20 =1800-500=1300. Average =1300/20=65.

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

The average of 9 numbers is 35. If each number is decreased by 5, what is the new average?

A. 35

B. 25

C. 30

D. 40

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
New average =35-5=30.

This question belongs to: Maths Average

Question #2

Share Report

The average of 3 numbers is 40. If one number is 30% more than average of other two, find the numbers? But simple: assume values.

A. 30,40,50

B. 25,40,55

C. 35,40,45

D. 36,40,44

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Sum=120. Check 30% more.

This question belongs to: Maths Average

Question #3

Share Report

Average of 8 numbers 900. If average of 5 is 895, average of remaining 3?

A. 908.33

B. 905

C. 910

D. 907

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Sum8=7200. Sum5=4475. Remaining=2725. Average≈908.33.

This question belongs to: Maths Average

Explore All Average MCQs