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The mean weight of 9 students is 25 kg ....

The mean weight of 9 students is 25 kg . If one more student is joined in the group the mean is unaltered , then the weight of the 10th student is `"_________"` (in kg ) .

A

25

B

24

C

26

D

23

Text Solution

Verified by Experts

The correct Answer is:
A
The sum of the weight of the 9 students = `25 xx 9 = 225` kg .
If one more student is joined in the group , then total number of students is 10 , and the mean is 25 .
The sum of the weights of the 10 students is `25 xx 10 = 250` kg .
The weight of the 10th student is `250 - 225 = 25`kg .
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