There are $40$ children in a class. The number of boys in the class is three times the number of girls. How many girls are there in the class?

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Solution

We have
Total no, of students is the class $= 40$
Let No. of girls be $x$
Then No, of Boys $= 3 x$
Now
No. of boys +No. of girls $= 40$
$3 x + x = 40$
$4 x = 40$
$x = 10$
Hence the no. of girls in the class is $10$ .

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There are 40 children in a class. The number of boys in the class is three times the number of girls. How many girls are there in the class?

We have Total no, of students is the class =40Let No. of girls be xThen No, of Boys =3xNowNo. of boys +No. of girls =403x+x=404x=40x=10Hence the no. of girls in the class is 10.

There are $40$ children in a class. The number of boys in the class is three times the number of girls. How many girls are there in the class?

We have
Total no, of students is the class $= 40$
Let No. of girls be $x$
Then No, of Boys $= 3 x$
Now
No. of boys +No. of girls $= 40$
$3 x + x = 40$
$4 x = 40$
$x = 10$
Hence the no. of girls in the class is $10$ .