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? Options: A) 2/15 B) 7/15 C) 10/30 D) 7/30 E) 8/30
Here, the sample space S = (1, 2, 3, 4, 5, ...,29, 30).   Let E = the event of getting a multiple of 3 or 5.   E = (3, 6, 9, 12, 15, 18, 5, 10, 20, 21, 24, 25, 27, 30)   P(E) = n(E) / n(S) = 14/30 = 7/15   ANSWER:7/15
<result>B</result>
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?