Question

The marks of Urmila of $4$ subjects are $52,70,66,60$ respectively. If the total average marks is equal to $60$. How many marks should urmila obtain in fifth subject.

Answer 1

Let the fifth subject marks be $x$

$\frac{52+70+66+60+x}{5}=60$

$52+70+66+60+x=60\times 5$

$52+70+66+60+x=300$

$x=54$