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mancylam1526

Probability

在計a題
我嘗試用2種方法計算
可是都看著不太合理 (TqT)
求指教 orz

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解答 0

  • Kms
    2020-03-28 12:51:04
    純粹邏輯思考,不必利用prob的公式 P(First card is a heart or at least one card is a heart) =P(at least one card is a heart) = 1- P(no cards are hearts) = 1- (52-13)/52 x (51-13)/51 P(First card is a heart and at least one card is a heart) =P(First card is a heart) = 13/52 x 51/51
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