Question

In a class of 60 students, on average, 8 will be left-handed. If a class include 36 “lefties”. estimate how many students are in class. The class has approximately... students.

Answer 1

If a in a class of 60 students, on average, 8 will be left-handed

then, the percentage of lefties is:

$\frac{8}{60}=\frac{2}{15}$

If a class include 36 “lefties”. then the total N is given by:

$N\cdot\frac{2}{15}=36$

solve for N:

$\begin{gathered} N=36\cdot\frac{15}{2} \\ N=270 \end{gathered}$

The class has 270 students