Question

A class consists of 150stundent out of which 30 are girl.the mean Mark scored by girl in a test is 73 (out of 100) and that of boys is 71

Answer 1

Answer:

Given, the number of girls out of 50 students=30 <br>

The numberof boys out of 50 students= 50-30=20 <br> Now, the marks obtained by 30 girls =

<br> and the marks obtained by 20 boys

<br> [

mean of marks scored by girls in a test is 73 and that of boys is 71] <br>

Mean score of the whole class <br>

<br>

<br> Hence, the mean score of whole class is 72.2.