Question

1. A standard deck of cards has one card missing. A card is then picked from the deck. What is the chance that it is a heart?

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Answer #1

P(Drawn card is a heart)

= P(Missing card is of heart)*P(Drawn card heart | Missing card heart) + P(Missing card is other than heart)*P(Drawn card heart | Missing card other than heart)

= (13/52)*(12/51) + (39/52)*(13/51)

= 1/4

= 0.25

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