Gujarati
Hindi
4.Average
medium

The average marks of $120$ students are $35.$ If average of passed students was $39$ and failed students was $15,$ then Find the number of students who have passed?

A

$80$

B

$100$

C

$120$

D

$140$

Solution

Let the no of passed student $= x$

According to the question

$x \times 39+15(120-x)=120 \times 35$

$39 x-15 x=4200-1800$

$24 x=2400 \Rightarrow x=100$

Hence no of passes student is $100 .$

Standard 13
Quantitative Aptitude

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.