Question

a jar contains 30 red marbles, 50 blue marbles, and 20 white marbles. you choose one marble from the jar at random. what is the theoretical probability of choosing a blue marble?

Answer 1

Answer: 1/2 chance of drawing a blue marble

Explanation:

Add the total number of marbles.

30+50+20=100

then put the number of marbles you are trying to find over the total number of marbles.

blue/total = 50/100 =.5

Answer 2

P(blue) = 1/2

Explanation:

P(blue) = number of blue marbles / total number of marbles

blue marbles = 50

Total marbles = 30+50+20 = 100

P(blue) = 50/100 = 1/2