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A jar contains 12 marbles, 5 of which are blue and 7 of which are red. If 4 marbles are
chosen at random and without replacement, what is the probability of selecting 3 blue ones and 1 red

  • Statistics -

    A delivery truck must make stops in eight different cities, designated by the first letter in
    the name of the city: A, B, C, D, E, F, G, and H. If the order in which the truck visits the eight locations
    is chosen randomly, what is the probability that it will visit them in alphabetical order?

  • Statistics (first Q) -

    First blue = 5/12
    Second blue = 4/11
    Third blue = 3/10
    Red = 7/9

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

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