Question

Last Thursday night, the nurse noted that there were 52 children in the ward. If 75% of them were girls, how many were boys?

Answer 1

The number of boys in the ward are 13

Step-by-step explanation

Given that;

The total number of children in the ward is 52

Since 75% of the children are girls, then we can find the number of girls below

`\begin{gathered} \text{ Number of girls in the ward }=\text{ 75\% of children in the ward} \\ \text{ Number of girls in the ward = }(75)/(100)\text{ }*\text{ 52} \\ \text{ Number of girls in the ward }=\text{ 0.75 }*\text{ 52} \\ \text{ Number of girls in the ward }=\text{ 39} \end{gathered}`

Recall,

Number of children = number of boys + number of girls

we can calculate the number of boys using the relationship above

52 = number of boys + 39

Subtract 39 from both sides

52 - 39 = number of boys + 39 - 39

13 = number of boys

Number of boys in the ward is 13

Hence, the number of boys in the ward are 13