Question

There are 12 male students in a class. This represents 40% of the class. How many students are in class?

Answer 1

30 students

Step-by-step explanation

There are 12 male students in the class.

That represents 40% of the class.

Let the total population of the class be x.

So, that means that:

`(40)/(100)\cdot\text{ x = 12}`

Now, we solve for x:

`\begin{gathered} 40\cdot\text{ x = 12 }\cdot\text{ 100} \\ \Rightarrow\text{ x = }\frac{12\cdot\text{ 100}}{40} \\ x\text{ = }(1200)/(40) \\ x\text{ = 30 students} \end{gathered}`

There are 30 students in the class.