Question

A math lab of 12 students has 9 girls. If next semester’s math lab enrolls 36 students, how many students are expected to be girls?

Answer 1

A math lab of 12 students has 9 girls . Next semester math lab enrolls 36 students, the expected numbers of girls can be calculated as follows

`\begin{gathered} 12\text{ student = 9 girls} \\ 36\text{ students = ?} \\ \text{cross multiply} \\ \text{expected number of girls = }(36*9)/(12) \\ \text{expected number of girls = }(324)/(12) \\ \text{expected number of girls = }27 \end{gathered}`