Average of 10 numbers 35. If average of 6 is 30, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 35. If average of 6 is 30, average of remaining 4?

A. 42.5

B. 45

C. 40

D. 43

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum10=350. Sum6=180. Remaining=170. Average=42.5.

This question belongs to: Maths Average

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Question #1

The average of first 9 natural numbers is:

A. 5.5

B. 4.5

C. 4

D. 5

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Correct Answer: Option D

Explanation:
Average of first n natural numbers = (n+1)/2. For n=9, average = 5.

This question belongs to: Maths Average

Question #2

Average of 9 numbers 790. If average of 6 is 785, average of remaining 3?

A. 798

B. 795

C. 800

D. 805

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Correct Answer: Option C

Explanation:
Sum9=7110. Sum6=4710. Remaining=2400. Average=800.

This question belongs to: Maths Average

Question #3

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

A. 69

B. 68

C. 67

D. 65

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Correct Answer: Option B

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

This question belongs to: Maths Average

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