Two cards are drawn from a well-shuffled pack of 52 cards without replacement. Then the probability that one is a red queen and other is a king of black color is p then the value of 663p is
A
2
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B
2.0
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C
02
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D
2.00
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Solution
Since the number of red queen cards =2
and number of black king cards =2
∴ Probability that first card is red queen and other is black king =2C152C1×2C151C1=1663
and probability that first card is black king and other is red queen =2C152C1×2C151C1=1663
Now, required probability p=1663+1663=2663
Hence, the value of 663p is 2.