Tickets numbered 1 to 50 are mixed and one ticket is drawn at random. Find the probability that the ticket drawn has a number which is a multiple of 4 or 7?  Choices
A) 9/25  B) 9/50  C) 18/25  D) 13/20  E) None of these
EXPL9/25N9/25TION:   S = {1, 2, 3, … , 49, 50}   E = {4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 7, 14, 21, 35, 42, 49}   n(S) = 50   n(E) = 18   P(E) = n(E)/n(S) = 18/50   = 9/25   9/25NSWER IS 9/25
<result>A</result>
Tickets numbered 1 to 50 are mixed and one ticket is drawn at random. Find the probability that the ticket drawn has a number which is a multiple of 4 or 7?