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    lil skropy's Avatar
    lil skropy Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 28, 2008, 02:48 PM
    probability using deck of cards
    hi well I really need help with this homework because my teacher kept on explaining something and I just don't get it!

    With replacement:

    1. 2Queens 4/52*4/52 I get that part.. but this..

    2. 2 clubs

    3. an ace and then a 2

    4.neither is a diamond

    5.A black 10 and then a red ten

    Without replacement:

    6.2 Queens I know this 1.. Its 4/52*3/51

    7.2 clubs

    8.an ace and then a 2

    9.neither is a diamond

    10.A black 10 and then a red ten

    Please just give me the first part. I will figure out the rest. Because I don't play cards but I really need help on this or I will fail math. Thank you very much:)
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
    		  
    #2

    Mar 28, 2008, 03:05 PM
    2. 2 clubs
    There are 13 clubs in a deck. Since there is replacement, the events are independent.

    (13/52)(13/52)

    3. an ace and then a 2
    There are 4 Aces and 4 twos. (4/52)(4/52)

    4.neither is a diamond
    There are 39 cards that are not diamonds.


    Without replacement:


    8.an ace and then a 2
    (4/52)(4/51)


    10.A black 10 and then a red ten
    There are 2 black 10's and 2 red 10's.

    See now?
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