Average of 30,45,60,75 is MCQ with Answer and Explanation

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Average of 30,45,60,75 is

A. 50

B. 55

C. 52.5

D. 45

Answer: Option C

Solution (By JKSSB Mock Tests)

210/4=52.5.

This question belongs to: Maths Average

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Question #1

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The average of 9 numbers is 42. If each number is decreased by 6, what is the new average?

A. 36

B. 42

C. 48

D. 30

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Correct Answer: Option A

Explanation:
New average =42-6=36.

This question belongs to: Maths Average

Question #2

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If the average of 7 numbers is 35 and the average of first 4 is 32, average of last 4 is 38. What is the 4th number?

A. 30

B. 35

C. 28

D. 32

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Correct Answer: Option B

Explanation:
Sum of 7 = 7×35=245. Sum first 4=4×32=128. Sum last 4=4×38=152. 4th number = 128 + 152 - 245 = 35.

This question belongs to: Maths Average

Question #3

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The average of 25,50,75 is

A. 60

B. 55

C. 45

D. 50

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Correct Answer: Option D

Explanation:
Sum=150. Average=50.

This question belongs to: Maths Average

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