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    dylanandkaylee's Avatar
    dylanandkaylee Posts: 3, Reputation: 1
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    #1

    Mar 21, 2007, 08:07 PM
    Mathematics problems
    How do I find five different rational numbers to represent 12%?



    An unfair coin, with P(Heads) = 0.55 is flipped two times. It says draw a tree diagram for this and determine the probability that both flips yield the same result. I drew a tree diagram, but I don't know how to determine the probability. Can you tell me how to do this?



    Finally, how do I find the probablity of picking a ten and a club, and picking a two or not a diamond from a deck of 52 cards? Hopefully, you can help me figure out these problems. I am having a hard time doing these.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 22, 2007, 07:10 AM
    How do I find five different rational numbers to represent 12%?
    12% is equal to 3/25. Find 4 more fractions which are equal to 3/25.



    An unfair coin, with P(Heads) = 0.55 is flipped two times. It says draw a tree diagram for this and determine the probability that both flips yield the same result. I drew a tree diagram, but I don't know how to determine the probability. Can you tell me how to do this?
    Start at the trunk of the tree and branch out with H=head and T=tails. If the probablity of getting a head is 0.55, then the probability of getting another head would be? Think multiplication principle.


    Finally, how do I find the probablity of picking a ten and a club, and picking a two or not a diamond from a deck of 52 cards? Hopefully, you can help me figure out these problems. I am having a hard time doing these.
    This problem statement is rather ambiguous. Are you drawing 2 cards with or without replacement? The probability of choosing a ten and a club: Do you mean in two draws without replacement?

    The probability of choosing a 2 or NOT a diamond in one draw:

    There are 39 non-diamonds in a deck. There are 4 twos.

    The probability of choosing a two is 4/52. The proabiltiy of choosing a non-diamond is 39/52. But you must subtract the non-diamonds which are twos because of overcounting.
    That would be 3/52.
    quantishree's Avatar
    quantishree Posts: 1, Reputation: 1
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    #3

    May 19, 2009, 12:37 PM

    At least one head on the two flips
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