Question

mean of markes of 10 students is 48.one student with 39 marks pulls out;new mean is​

Answer 1

Answer:

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Explanation:

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Answer 2

The new mean of the student's marks in 49.

Explanation:

The mean of marks of 10 students is 48.Therefore,the total marks or the summation of all the marks obtained by 10 students=$(10\times 48)$=480 marks.

Now,if student pulls out from the group with 39 marks,the total number of students become 9 and the summation of the marks of all the students=$(480-39)$=441.

Therefore,the new mean of the marks of the 9 remaining students=$441\div 9$=49

The new mean of the marks of the students is 49.