Question

The marks of 5 students out 10 in class test of mathematics are 7,8,7,9 and 6 then what will be mean marks

Answer 1

The mean marks is 7.4.

Step-by-step explanation:

We are given the marks of 5 students out 10 in class test of mathematics are 7, 8, 7, 9 and 6.

As we know that mean formula for a group of numbers is given by;

           Mean = $\frac{\sum X}{n}$

where, $\sum X$ = Sum of all values in the data

               n  = Total number of observations in the data

Mean tells us that on average the students score how many marks out of 10 in a class test of mathematics.

Here, Let X = Score of each student out of 10 in class test of mathematics

So,    Mean = $\frac{7+8+7+9+6}{5}$

                   = $\frac{37}{5}$ = 7.4

Therefore, the mean marks is 7.4 marks.