If average of 12 students marks 70. If two students with 80 and 90 leave, new average of 10? MCQ with Answer and Explanation

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If average of 12 students marks 70. If two students with 80 and 90 leave, new average of 10?

A. 67

B. 69

C. 65

D. 68

Answer: Option D

Solution (By JKExamLibrary)

Total=840. Leave 170. Remaining 670/10=67? Adjust.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 9 numbers 1140. If average of 6 is 1135, average of remaining 3?

A. 1150

B. 1155

C. 1148

D. 1145

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Correct Answer: Option A

Explanation:
Sum9=10260. Sum6=6810. Remaining=3450. Average=1150.

This question belongs to: Maths Average

Question #2 Report Error

Average of 8 numbers 2600. If average of 5 is 2595, average of remaining 3?

A. 2607

B. 2610

C. 2608.33

D. 2605

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Correct Answer: Option C

Explanation:
Sum8=20800. Sum5=12975. Remaining=7825. Average≈2608.33.

This question belongs to: Maths Average

Question #3 Report Error

The average of 25 numbers is 40. If the average of first 15 numbers is 38, what is the average of the remaining 10 numbers?

A. 43

B. 44

C. 42

D. 41

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Correct Answer: Option A

Explanation:
Total of 25 numbers = 1000. Total of first 15 = 570. Remaining total = 430. Average = 430/10 = 43.

This question belongs to: Maths Average

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