Average marks of class 48. If 5 students 60 average, 5 students 30 average, overall? MCQ with Answer and Explanation

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Average marks of class 48. If 5 students 60 average, 5 students 30 average, overall?

A. 47

B. 50

C. 48

D. 45

Answer: Option C

Solution (By JKExamLibrary)

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This question belongs to: Maths Average

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Question #1

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Average of 10 numbers 2680. If average of 6 is 2675, average of remaining 4?

A. 2685

B. 2686

C. 2687.5

D. 2690

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Correct Answer: Option C

Explanation:
Sum10=26800. Sum6=16050. Remaining=10750. Average=2687.5.

This question belongs to: Maths Average

Question #2

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Find the average of the first 10 even numbers.

A. 10

B. 12

C. 11

D. 11.5

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Correct Answer: Option C

Explanation:
Sum of first 10 even numbers = 10×11=110 (since sum = n(n+1) for first n evens? Actually sum = 2+4+...+20 = 2*(1+2+...+10)=2*55=110). Average=110/10=11.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1430. If average of 6 is 1425, average of remaining 4?

A. 1435

B. 1440

C. 1436

D. 1437.5

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Correct Answer: Option D

Explanation:
Sum10=14300. Sum6=8550. Remaining=5750. Average=1437.5.

This question belongs to: Maths Average

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