Tickets with numbers ranging from 1 to 20 are mingled together and a ticket is selected at random. What is the chance that the ticket drawn has a number that is a multiple of three or five?
A. 1/2
B.2/5
C. 8/15
D. 9/20
Answer:D
Tickets with numbers ranging from 1 to 20 are mingled together and a ticket is selected at random. What is the chance that the ticket drawn has a number that is a multiple of three or five?
A. 1/2 B.2/5 C. 8/15 D. 9/20
Explanation: S = 1, 2, 3, 4,...., 19, 20 in this case.E = occurrence of a multiple of 3 or 5 = 3, 6, 9, 12, 15, 18, 5, 10, 20.P(E) = n(E)/n(S) = 9/20 P(E) .