Question

Tickets numbered 1 to 30 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?

Answer 1

probability of getting multiple of 3 is 10/30=1/3
and multiple of 5 is 6/30=1/5

Answer 2

the probability of getting a multiple of 3 or 5 is 14/30 5's multiple are 6 and 3's multiple are 10. 15 and 30 are common therefore the number of favourable otcomes will 14