Average weight of 40 students 45 kg. If 10 more with average 50 kg join, new average? MCQ with Answer and Explanation

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Average weight of 40 students 45 kg. If 10 more with average 50 kg join, new average?

A. 47

B. 46

C. 46.25

D. 45

Answer: Option B

Solution (By JKSSB Mock Tests)

Total old=1800. New=500. Total 2300 for 50. Average=46.

This question belongs to: Maths Average

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Question #1

What is the average of the first 5 composite numbers?

A. 7.2

B. 7.6

C. 8.0

D. 7.4

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Correct Answer: Option D

Explanation:
First 5 composites: 4,6,8,9,10 sum=37, avg=37/5=7.4.

This question belongs to: Maths Average

Question #2

Average of 16,24,32,40,48 is

A. 35

B. 34

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Correct Answer: Option C

Explanation:
Sum=160. Average=32.

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Question #3

The average of 10,20,30,40,50 is

A. 32

B. 28

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Correct Answer: Option C

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