Question

There are 408 students who are enrolled in an introductory geology course if there are 8 boys to every 9 girls how many boys are in the course?

Answer 1

Given:

In total there are 408 students who are enrolled in an introductory geology course.

Ratio of the number of boys to girls is 8:9

To find: Number of boys in the course.

Step-by-step explanation:

`\text{Let 8x and 9x be the number of boys and girls.}`

`\begin{gathered} 8x+9x=408 \\ 17x=408 \\ x=(408)/(17) \\ x=24 \end{gathered}`
`\begin{gathered} \text{Number of boys in the course=8}*24 \\ =192 \end{gathered}`

Therefore, number of boys in the course is 192.