Basics of Probability and Counting

Would you rather have gym class in the morning of afternoon?
What is P(grade 8 and morning)?

A vehicle is chosen at random from those in the parking lot. What is P(hybrid or sedan)?

A vehicle is chosen at random from those in the parking lot. What is P(gas or hybrid)?

Three coins are tossed. What is the probability exactly one heads appears in the three tossed coins?

"Would you rather have gym class in the morning of afternoon?"
What is P(grade 10 or afternoon)?

A fair die is rolled 100 times. Which of these graphs shows is a most likely display of the results?

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What is the probability of spinning a fair 6-sided spinner and landing on an odd number?

• 1 / 2

• 5 / 6

• 6 / 6 or 1

• 0 / 6

What is the probability of rolling a fair 6-sided die and having it land on an odd number?

• 3/4

• 1/3

• 1/2

• 2/5

If you randomly pick from the following M & M colors from a bag, what is the probability that you choose blue?

• 8/26 or 4/13

• 7/26

• 8/25

• 1/3

Is this probability assignment possible?

• YES! Because all probabilities add up to 1!

• NO! Because it doesn't have enough probabilities.

• NO! Because the probabilities do not add up to 1.

• NO! Because I cannot get a grade of 0, 1, 2, 3, or 4.