Question 947096: A card is drawn from a pack of 52 cards find the probability of getting spade or ace or a red card? Found 2 solutions by stanbon, Fombitz:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A card is drawn from a pack of 52 cards find the probability of getting spade or ace or a red card?
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Count the # of ways to succeed::
spade = 13 cards including the ace of spades
red = 26 cards including the ace of hearts and ace of diamonds
ace = 4 cards but 3 are already selected above
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# of ways to succeed:: (13-1 + 26-2 + 4) = 12+24+4 = 40
# of possible outcomes:: 52
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P(spade or red or ace) = 40/52 = 10/13
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Cheers,
Stan H.
You can put this solution on YOUR website! In a standard deck, there are:
13 spades
4 aces
26 red cards
You also have to account for double counting,
The ace of spades (spade)
The ace of hearts (red)
The ace of diamonds (red)
So then,
.
.
.
You could also look at the cards that are left and work backwards.
It would be all the clubs minus the ace of clubs which would be 12 cards.
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