Question

Jonathan has a bag of 20 marbles of which 10 are red. He picks one marble from the bag, records the color, and replaces it during 10 trials. During the course of Jonathan’s experiment, he chose 1 red marble for each 5 marbles drawn. What is the theoretical probability of choosing a red marble?

Answer 1

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Your answer is

$\frac{red \: marbles}{total \: marbles} = \frac{10}{20} = \frac{1}{2}$

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