The probability of choosing a green marble on the first draw is 5/20 (since there are 5 green marbles out of a total of 20 marbles). After replacing the marble, the probability of choosing a red marble on the second draw is 10/20 (since there are 10 red marbles out of a total of 20 marbles).
Therefore, the probability of choosing a green marble and then a red marble is:
P(green, then red) = P(green) * P(red) = (5/20) * (10/20) = 0.125
So the probability of choosing a green marble on the first draw and a red marble on the second draw is 0.125 or 12.5%.
A bag contains 5 green marbles, 5 blue marbles, and 10 red marbles. You choose a marble, replace it, and choose again. What is P(green, then red)?
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1 answer