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iragen [17]
2 years ago
6

Phil has 7 green marbles and 3 purple marbles in a bag. he removes a marble at random, records the color, puts it back, and then

repeats this process until he has withdrawn 6 marbles. what is the probability that exactly three of the marbles that he removes are green? express your answer as a decimal rounded to the nearest thousandth.
Mathematics
1 answer:
Lesechka [4]2 years ago
7 0
The probability of selecting a green marble in one turn is 7/7+3 which is 7/10. For 3 turns, we will do\frac{7}{10} * \frac{7}{10} * \frac{7}{10} = \frac{343}{1000}
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