Average of 15 numbers 210. If average of 9 is 205, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 210. If average of 9 is 205, average of remaining 6?

A. 218

B. 215

C. 217.5

D. 220

Answer: Option C

Solution (By JKExamLibrary)

Sum15=3150. Sum9=1845. Remaining=1305. Average=217.5.

This question belongs to: Maths Average

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Question #1

What is the average of the first 6 prime numbers?

A. 6.5

B. 6.83

C. 6.33

D. 7

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Correct Answer: Option B

Explanation:
Primes:2,3,5,7,11,13 sum=41, avg=41/6=6.83.

This question belongs to: Maths Average

Question #2

The average of 180,240,300 is

A. 235

B. 240

C. 250

D. 230

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Correct Answer: Option B

Explanation:
720/3=240.

This question belongs to: Maths Average

Question #3

Average of 20 numbers 90. If average of 12 is 85, average of remaining 8?

A. 96

B. 95

C. 97.5

D. 100

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Correct Answer: Option C

Explanation:
Sum20=1800. Sum12=1020. Remaining=780. Average=97.5.

This question belongs to: Maths Average

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