Question

016
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

$\huge\star\underline{\mathtt\red{A}\mathtt\green{N}\mathtt\blue{S}\mathtt\purple{W}\mathtt\orange{E}\mathtt\pink{R}}\star\:$

Numbers divisible by 5 between 1 and 90 are

= 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90

= 18

Probability = No. of favourable outcomes/ total no. of outcomes

=> 18/90

=> 1/5