SOLUTION: Pierre asks Sherry a question involving the theoretical probability of a compound event in which you flip a coin and draw a marble from a bag of marbles. The bag of marbles coins 3

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Question 1025013: Pierre asks Sherry a question involving the theoretical probability of a compound event in which you flip a coin and draw a marble from a bag of marbles. The bag of marbles coins 3 white marbles, 8 green marbles, and 9 black marbles. Sherry's answer, which is correct, is 12/40. What was Pierre's question?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Flip a coin has a probability of 1%2F2 and it's independent so the probability of the marble problem was,
P=P%5Bm%5D%2A%281%2F2%29=%2812%2F40%29=3%2F10
P%5Bm%5D=3%2F20
Probability of choosing a white marble from the bag fits the bill.
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Sherry gets two marks off for not putting her probability in lowest terms though.