Question

A teacher calculated the mean of 27 students mark to be 62. A student who later completed the assessment got a mark of 53. What is the new mean of the class, to two decimal places?

Answer 1

first of all the average score of students is 62.

and there are 27 students

so full marks scored by students are 27×62= 1674

and 1 new students added to that so his score would be 1674+ 53(his marks)= 1727

so now the mean of students are beause there are one more students so 27+1 = 28 then 28÷1727= 61.6 is the mean now