Question

What expression can be used to find number of boys on the team

Answer 1

Option 3: 21 x 3/7

Explanation:

• The ratio of boys to girls = 3:4

,

• The number of members in the track team = 21

To find the number of boys on the team:

`\begin{gathered} \text{ Number of boys}=\frac{\text{ The proportion of boys}}{Total\text{ proportion}}*\text{ The number of members on the team} \\ \begin{equation*} =(3)/(3+4)*21 \end{equation*} \\ =(3)/(7)*21 \\ =21*(3)/(7) \end{gathered}`

Therefore, the expression that can be used to find the number of boys on the team is:

`21*(3)/(7)`

The third option is correct.