Page 151 - TB_6B

Activity 1 Theoretical Probability

Learn about the theoretical probability.

Theoretical probability is a comparison of a number of favorable
outcomes to the number of possible outcomes when the outcomes
are equally likely.

Theoretical probability = number of favorable outcomes
number of possible, equally likely outcomes

1 . Find the probability of each outcome when spinning a color.

a. P(red) = number of favorable outcomes
number of possible, equally likely outcomes

= red = 1
red, green, yellow 4

b. P(yellow) Probability can be written as a
c. P(green) ratio, a decimal between 0 and
1, and a percent.
25
P(red) = 100 , 0.25, or 25%

2 . Find the probability of each outcome when rolling a die.

a. P(1) b. P(3)

3 . There are different colored marbles in the bag.

Find the probability of each outcome when pulling

out a marble from the bag.

a. P(yellow) b. P(blue)

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