The average marks of 18 students is 68. If a student with 82 marks joins, what is the new average? MCQ with Answer and Explanation

The average marks of 18 students is 68. If a student with 82 marks joins, what is the new average?

A. 68.5

B. 69.0

C. 68.2

D. 68.74

Answer: Option D

Sum=18×68=1224. New sum=1224+82=1306. New avg=1306/19=68.74.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 9 numbers 2040. If average of 6 is 2035, average of remaining 3?

A. 2048

B. 2045

C. 2055

D. 2050

Correct Answer: Option D

Explanation:
Sum9=18360. Sum6=12210. Remaining=6150. Average=2050.

This question belongs to: Maths Average

Question #2 Report Error

The average of 5 numbers is 18. If 3 numbers average 15, average of remaining 2?

A. 20

B. 21

C. 22.5

D. 25

Correct Answer: Option C

Explanation:
Sum5=90. Sum3=45. Remaining=45. Average=22.5.

This question belongs to: Maths Average

Question #3 Report Error

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

A. 58

B. 55

C. 56

D. 50

Correct Answer: Option B

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

This question belongs to: Maths Average