Question

The ratio of boys to girls is 2:3. There are 20 students. How many boys are there. How many girls are there

Answer 1

$$\begin{gathered} \mathrm{Dear}\mathrm{Student}, \\ \mathrm{Let}\mathrm{the}\mathrm{number}\mathrm{of}\mathrm{boys}=2\mathrm{x} \\ \mathrm{Then}\mathrm{the}\mathrm{number}\mathrm{of}\mathrm{girls}=3\mathrm{x} \\ \mathrm{Now},\mathrm{according}\mathrm{to}\mathrm{question}: \\ 2\mathrm{x}+3\mathrm{x}=20 \\ \Rightarrow 5\mathrm{x}=20 \\ \Rightarrow \mathrm{x}=\frac{20}{5}=4 \\ \mathrm{Number}\mathrm{of}\mathrm{boys}=2\times 4=8 \\ \mathrm{Number}\mathrm{of}\mathrm{girls}=3\times 4=12 \\ \mathrm{Regards} \end{gathered}$$