Question

The ratio of boys to girls in a class $3:2$. If the number of boys is $6$ more than number of girls Find the no. of girls and the total strength.

• A. $\text{girls =12}$, $\text{total=20}$
• B. $\text{girls =18}$, $\text{total=30}$
• C. $\text{girls =18}$, $\text{total=36}$
• D. $\text{girls =12}$, $\text{total=30}$

Answer 1

Answer: (D)

$\text{girls =12}$, $\text{total=30}$

$Lettheratioconstantbek,thenno.ofboys=3kandno.ofgirls=2know3k=6+2kork=6\therefore no.ofgirls=2k=2\times 6=12andtotalno.ofstudents=(3k+2k)=30$