Average of 8 numbers 50. If average of 5 is 45, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 50. If average of 5 is 45, average of remaining 3?

A. 57

B. 60

C. 55

D. 58.33

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum8=400. Sum5=225. Remaining=175. Average≈58.33.

This question belongs to: Maths Average

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Question #1

If average of 20 numbers is 50 and 25 is added to each, new average is

A. 55

B. 75

C. 50

D. 60

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Correct Answer: Option B

Explanation:
New average =50 +25=75.

This question belongs to: Maths Average

Question #2

What is the average of the first 4 prime numbers?

A. 4.0

B. 4.5

C. 5

D. 4.25

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Correct Answer: Option D

Explanation:
Primes:2,3,5,7 sum=17, avg=17/4=4.25.

This question belongs to: Maths Average

Question #3

Average of 15 numbers 2060. If average of 9 is 2055, average of remaining 6?

A. 2070

B. 2067.5

C. 2065

D. 2068

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Correct Answer: Option B

Explanation:
Sum15=30900. Sum9=18495. Remaining=12405. Average=2067.5.

This question belongs to: Maths Average

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