Question

a box contains cards numbered 1 to20 a card is drawn at random from the box. find the probability that numbers on the drawn card is a prime number, a composite number and a number divisible by 3

Answer 1

Hey mate!

S = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}

i) P(drawing a prime number) = 8/20
=>2/5.

ii) P(drawing a composite number) = 12/20
=>3/5.

iii) P (drawing a number divisible by 3) = 6/20
=>3/10.

Hope it helps :)

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