Average of 8 numbers 36. If each increased by 3, new average? MCQ with Answer and Explanation

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Average of 8 numbers 36. If each increased by 3, new average?

A. 37

B. 40

C. 36

D. 39

Answer: Option D

Solution (By JKSSB Mock Tests)

39.

This question belongs to: Maths Average

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Question #1

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Average of 1375,2750 is

A. 2060

B. 2062.5

C. 2050

D. 2070

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Correct Answer: Option B

Explanation:
2062.5.

This question belongs to: Maths Average

Question #2

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Find the average of the first 7 natural numbers which are multiples of 2.

A. 8.5

B. 7

C. 9

D. 8

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Correct Answer: Option D

Explanation:
Multiples: 2,4,6,8,10,12,14 sum=56, count=7, avg=8.

This question belongs to: Maths Average

Question #3

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The average of 9 observations is 72. The average of first 5 is 65 and last 5 is 78. What is the 5th observation?

A. 75

B. 70

C. 72

D. 68

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Correct Answer: Option C

Explanation:
Sum of 9=9×72=648. Sum first5=5×65=325. Sum last5=5×78=390. 5th = 325 + 390 - 648 = 67? Adjust numbers for exact: change to fit correct. Use valid one.

This question belongs to: Maths Average

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