Question

Westin performed an experiment in which he randomly pulled a marble from a bag, recorded its color, put it back, and then repeated. He did this 36 times, and 9 of those times he pulled a purple marble.

Which bags of marbles are good models for this experiment?

Select two that apply.

A ) 4 purple, 5 blue, 2 green, 1 red

B ) 4 purple, 5 blue, 2 green, 1 red

C ) 9 purple, 9 red, 9 green

D ) 9 purple, 9 red, 9 green

E ) 1 purple, 1 blue, 1 green, 1 red

F ) 1 purple, 1 blue, 1 green, 1 red

G ) 4 purple, 4 blue, 4 yellow, 4 orange

Answer 1

G) 4 purple, 4 blue, 4 yellow, 4 orange

Answer 2

Explanation:

Based on the experiment, 9 times he pulled a purple marble out of the 36 trials.

That means he has a 1/4 probability of pulling a purple marble

This means that the purple marble ideally makes up one-quarter of the total marble in the bag.

Choice G and F satisfy the condition as stated above.

Hope that helps!