Question

Question 18 (iii)
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a number divisible by 5.

Answer 1

Total number of favourable outcomes = 90
The number divisible by 5 from 1 to 90 are 18.
$\therefore$ Favourable outcomes = 18
Hence, P (getting a number divisible by 5) = $\frac{18}{90}=\frac{1}{5}$