Question

Tickets are numbered from 1 to 100. They are well shuffled and a ticket is drawn at random. What is the probability that the drawn ticket has a number 5 or a multiple of 5?​

Answer 1

Answer:

Let S be the sample space

S={1 ,2,3,------,100}

n(S) =100

Let A be the event : ticket drawn is a multiple of 5

A={5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85, 90,95,100}

n(A) =20

p(A) =n(A) / n(S)

= 20 /100 = 4/1