Question

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
A) 1/2
B) 2/5
C) 8/15
D) 9/20

Answer 1

A) 1/2

As: Multiples of 5 are-5,10,15 and 20

Multiples of 3 are= 3,6,9,12,15,18

Thus, total no. of desirable outcomes =10

This means that the probability is 10/20.

(No. of desired outcomes/Total no. of outcomes)

Therefore, the answer is 1/2

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