Question

The ratio of the number of girls to the number of boys in a town is $90\%$. if the total number of boys and girls in the town is $190$, how many girls are in the town ?

• A. $100$
• B. $110$
• C. $90$
• D. $80$

Answer 1

The correct option is C $90$

Ratio of girls and boys $=90\%$
or, Girls / boys = 90/100
or, Girls / boys = 9/10
Let number of girls $=9x$
Number of boys $=10x$
According to question,
$9x+10x=190$
$x=10$
So, number of girls $=9\times 10=90$
Alternatively,
No. of girls $=\frac{(9\times 190)}{19}=90$