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प्रश्न
A card is drawn at random from a well-shuffled deck of playing cards. Find the probability that the card drawn is either a king or a queen.
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उत्तर
Let S be the sample space of drawing a card from a well-shuffled deck.
`n(S)=""^52C_1=52`
There are 4 king and 4 queen cards in a deck.
So there are 4 4 =8 cards which are either king or queen.
a card which is either a king or a queen can be drawn in ` ""^8C_1=8`
Probability of drawing a card which is either a king or a queen=8/52=2/13
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