Question

In a class, one out of every six students fails. If there are 42 students in the class, how many pass?

Answer 1

We have
One out of every six student fails, which means that $\frac{1}{6}$th of the total students fail in the class.
And total number of students in the class = 42.
Therefore, the number of students who fail = $\left(\frac{1}{6}\times 42\right)$ = 7.
So, the number of students who pass = (Total students $-$the number of students who fail) = 42 $-$ 7 = 35.