Question

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 ?

Answer 1

Answer:

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Answer 2

Answer:

Step-by-step explanation:

n(S) = 20

n(Even no) = 10 = n(E)

n(Prime no) = 8 = n(P)

P(E U P) = 10/20 + 8/20 - 1/20 = 17/20