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drawing a red checker from bag of 9 black checksrs and 6 red checkers, replacing it and drawing another red checker

  • math -

    The probability of drawing a red checker = # of red checkers/total. Since the red checker is replaced, the probability of drawing red the second time is the same.

    The probability of both/all events occurring is found by multiplying the probabilities of the individual events.

    I hope this helps.

  • math -

    Billy takes two marbles, without replacement, from a bag that contains only six yellow marbles and three blue marbles.
    What is the probability that he gets one marble of each color?

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