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,

`(6)/(60)=(21)/(x)`

On simplification we get

`\begin{gathered} 6x=21*60 \\ x=(21*60)/(6) \\ x=21*10 \\ x=210 \end{gathered}`

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