Question

PLEASE HELP ME.......

Amy 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

BLUE 127

GREEN 201

YELLOW 172

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.

Answer 1

To find the experimental probability of each, divide the number for each color by 500. Then, multiply it by 20, to find the amount expected out of 20.

Blue 127 / 500 = 0.254 0.254 x 20 = 5

Green 201 / 500 = 0.402 0.402 x 20 = 8

Yellow 172 / 500 = 0.344 0.344 x 20 = 7