Unit 9 Test

Probability can be written as ...

• a fraction
• a decimal
• a percent
• all of the above

A letter from the words MATH TEST is chosen at random. Find the P(a vowel).

• 3/4

• 1/4

• 1/8

• 5/8

A pencil box contains 3 red, 5 purple, 7 yellow, 4 blue, and 2 orange colored pencils. If one is chosen at random, find the complement of drawing a yellow pencil.

• 57.1%

• 33.3%

• 66.6%

• 38.1%

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%
• 70%
• 100%
• 0%

Use the spinner to find the following probability:

P(a number greater than 3)

• 1/2

• 2/3

• 5/8

• 4/5

Use the spinner to find the following probability:

P(prime number)

*1 is not a prime number

• 1/2

• 7/8

• 3/8

• 4/5

Were number's 5 and 6 examples of Theoretical probability or Experimental probability?

• Theoretical Probability

• Experimental Probability

Penny wants to know the probability that red is a person's favorite color. She asked people what their favorite color is and recorded the results below.

What is the experimental probability that red is a person’s favorite color? Write your answer as a percentage rounded to the nearest whole number.

What is the theoretical probability that red is a person’s favorite color? Write your answer as a fraction in simplest form.

Theoretically, how many people should have red as their favorite color?

• 280

• 1

• 340

• 300