A bag contains:

5 red marbles, 6 blue marbles, 3 green marbles, 4 black

marbles, 2 yellow marbles.

A marble will be drawn from the bag and replaced 200 times.

What is a reasonable prediction for the number of times a

yellow or green marble will be drawn?

(a) 20

b) 30

c) 50

d) 40

c) 50

Step-by-step explanation:

There are 5 red marbles, 6 blue marbles, 3 green marbles, 4 black

marbles, 2 yellow marbles for a total of 20 marbles

P (yellow or green marble) = number of green or yellow marbles / total

= 5/20 = 1/4

Take the probability times the number of draws to determine the number of times we would expect to see a green or yellow marble

1/4 * 200 = 50