Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is -.	Choose one.
A) 17/20
B) 1/5
C) 19/25
D) 1/7
E) 2/9
n(S) = 20   n(Even no) = 10 = n(E)   n(Prime no) = 8 = n(P)   P(Eá´œP) = 10/20 + 8/20 - 1/20 = 17/20   17/20NSWER 17/20
<result>A</result>
Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is -.