Question

The ratio of boys to girls in Mrs. Townsend's class is $3:4$. If there are $15$ boys in her class, how many students are there altogether?

• A. $35$
• B. $30$
• C. $20$
• D. $15$

Answer 1

The correct option is A $35$

Given: Ratio of boys to girls $=3:4$

Number of boys in the class $=15$

The ratio table is

Boys	3
Girls	4

Since the ratio is $3:4$, the boys' row will increase by $3$ and girls' row will increase by $4$ subsequently.

Boys	3	6	9	12	15
Girls	4	8	12	16	20

From the ratio table, we can observe that for $15$ boys, there are $20$ girls in the class.

So, the answer is $20$.

Really?

No!

The question said, find the TOTAL number of students.

Total students $=$ Boys $+$ Girls

$=15+20=35$ students