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 the correct option:  A) 17/25  B) 17/24  C) 17/23  D) 17/20  E) 17/21
n(S) = 20   n(Even no) = 10 = n(E)   n(Prime no) = 8 = n(P)   P(EᴜP) = 10/20 + 8/20 - 1/20 = 17/20   Answer: 17/20
<result>D</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