Betty has a bag with 20 marbles in it. Some of the marbles are blue, some are green, and some are yellow.

She draws one marble at random, records the color, and returns it to the bag.

Here is her data after 500 trials:

Blue Green Yellow

392 52 56

Estimate the probability that a marble drawn at random will be blue.

Estimate the probability that a marble drawn at random will be green.

Estimate the probability that a marble drawn at random will be yellow.

Express each probability estimate as a fraction with 20 in the denominator.

Question

Gunner Poole

Mathematics

17 April, 07:53

Betty has a bag with 20 marbles in it. Some of the marbles are blue, some are green, and some are yellow.

She draws one marble at random, records the color, and returns it to the bag.

Here is her data after 500 trials:

Blue Green Yellow

392 52 56

Estimate the probability that a marble drawn at random will be blue.

Estimate the probability that a marble drawn at random will be green.

Estimate the probability that a marble drawn at random will be yellow.

Express each probability estimate as a fraction with 20 in the denominator.

+1

Answers (1)

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Marcus · Answer 1

392 / 500 double and take one decimal place to see percentage

52/500

56/500 e. g. 56*2 = 112 now take 1 decimal so it is 11.2%

now divide each by 20