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An urn contains 4 red and 3 blue marbles. What is the probability when three marbles are selected randomly that all 3 will be red, if we select each marble
a) with replacement
b) without replacement

  • Math - probability - ,

    Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

  • lccc - ,

    with replacement:
    prob = (4/7)(4/7)(4/7)

    without replacement:
    prob = (4/7)(3/6)(2/5)

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