Two cards are drawn from the pack of 52 cards. Find the probability that both are diamonds or both are kings

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 Two cards are drawn from the pack of 52 cards. Find the probability that both are diamonds or both are kings.

الأجوبة

 Total no. of ways = 52C2
Case I: Both are diamonds = 13C2
Case II: Both are kings = 4C2 
P (both are diamonds or both are kings) = (13C2 + 4C2 ) / 52C2

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