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Question
A card is drawn at random from a pack of well shuffled 52 playing cards. Find the probability that the card drawn is a spade.
Solution
There are 52 playing cards.
∴ n(S) = 52
Let B be the event that the card drawn is a spade.
There are 13 spade cards.
∴ n(B) = 13
∴ P(B) = `("n"("B"))/("n"("S"))`
= `13/52`
= `1/4`
Hence, the probability that the card drawn is a spade is =`1/4`.
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