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20 September, 02:35

From a standard deck of playing card, a card is selected from random. what is the probabilty that the card selected is a black card or a 4?

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  1. 20 September, 05:58
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    A deck has 52 cards

    A deck has 25 black cards.

    A deck has 4 "4" cards but 2 of them are black, therefore 2 red

    P (black or 4) = (25 + 2) / 52 = 27/52
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