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24 August, 15:45

There are 4 red marbles and 3 blue marbles in a bag. Once a marble is drawn it is not replaced. Find the probability of drawing two red marbles in a row.

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  1. 24 August, 16:19
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    2/7

    Step-by-step explanation:

    4 red marbles and 3 blue marbles in a bag = 7 marbles

    P (red) = red/total = 4/7

    No replacement

    3 red marbles and 3 blue marbles in a bag = 6 marbles

    P (red) = red/total = 3/6 = 1/2

    P (red, no replacement, red) = 4/7 * 1/2 = 2/7
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