Question

A class of 10 students was given a test in mathematics. the marks,out of 50,secured by the students were as follows: 31,36,27,38,45,39,32,29,41,38 find the mean score

Answer 1

total marks = 50
scores obtained = 31 , 36 , 27, 38 ,45 ,39, 32, 29, 41, 38
mean score = sum of observations / no. of observations
=31+36+27+38+45+39+32+29+41+38/10
=373/10
=37.7

Answer 2

The mean score = 35.6

Given :

A class of 10 students was given a test in mathematics. the marks,out of 50,secured by the students were as follows 31 , 36 , 27, 38 ,45 ,39, 32, 29, 41, 38

To find :

The mean score

Solution :

Step 1 of 2 :

Find sum of scores of 10 students

The marks secured by 10 students are 31 , 36 , 27, 38 ,45 ,39, 32, 29, 41, 38

Sum of the marks

= 31 + 36 + 27 + 38 + 45 + 39 + 32 + 29 + 41 + 38

= 356

Step 2 of 2 :

Find the mean score

Total number of students = 10

The required mean score

$\displaystyle \sf{ = \frac{356}{10} }$

$\displaystyle \sf{ = 35.6}$

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