Question

What is the probability of a number selected from 1, 2, 3, ....20 such that it is a prime number?

Answer 1

Step-by-step explanation:

nS = 20

Event A = { 2,3,5,7,11,13,17,19}

nA = 8

P(A) = n(a) / n(s) = 8/20 = 4/10 = 2/5

Answer 2

Answer:

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