A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is
Total numbers of elementary events are: 30
Let E be the event of selecting a prime number
Favorable outcomes are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
Numbers of favorable outcomes are: 10
P (prime number) = P (E) = 10/30 = 1/3