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:D
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
Explanation: Here, S = {1, 2, 3, 4, …., 19, 20}.