The average of 7 numbers is 41. If each number is multiplied by 2, what is the new average? MCQ with Answer and Explanation

The average of 7 numbers is 41. If each number is multiplied by 2, what is the new average?

A. 84

B. 41

C. 82

D. 61.5

Answer: Option C

New average =41×2=82.

This question belongs to: Maths Average

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Question #1 Report Error

In a class of 40 students, average marks in Maths is 65. If average of 10 students is 80, what is average of remaining?

A. 60

B. 58

C. 55

D. 62

Correct Answer: Option A

Explanation:
Total marks = 40×65=2600. Marks of 10=10×80=800. Remaining marks=1800. Average=1800/30=60.

This question belongs to: Maths Average

Question #2 Report Error

Average of 12 numbers 1220. If average of 8 is 1215, average of remaining 4?

A. 1228

B. 1225

C. 1230

D. 1232

Correct Answer: Option C

Explanation:
Sum12=14640. Sum8=9720. Remaining=4920. Average=1230.

This question belongs to: Maths Average

Question #3 Report Error

Average of 7 numbers 40. If average of 3 is 35, average of remaining 4?

A. 40

B. 42

C. 43.75

D. 45

Correct Answer: Option C

Explanation:
Sum7=280. Sum3=105. Remaining=175. Average=43.75.

This question belongs to: Maths Average