Question

In a class of 60 student, on average, 6 will be left handed. if a class includes 21 lefties, estimate how many students are in class.

Answer 1

Given:

In a class of 60 student, on average, 6 will be left handed.

If a class includes 21 lefties, then we need to estimate total number of students in class.​

The given can be expressed in the form as follows,

$\frac{6}{60}=\frac{21}{x}$

On simplification we get

$\begin{gathered} 6x=21\times60 \\ x=\frac{21\times60}{6} \\ x=21\times10 \\ x=210 \end{gathered}$

Hence, the total number of students in a class is 210.