Probability Review

Mrs. Moreno has a box containing 6 lipsticks, 4 eye shadows, 6 eye liners, and 5 mascaras. If she randomly chooses one item from the box, what is the probability that she will grab a lipstick?

• 3/7

• 15/21

• 5/7

• 6/21

Mrs. Elder has a box containing 6 cracker, 3 peppermints, 6 bubble gums, and 3 licorice sticks. If she randomly chooses one piece from the box, what is the probability that she will grab a cracker or a peppermint?

• peppermint

• 1/6

• 1/2

• 1/3

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students

• Picking 2 marbles from a bag without replacing the first marble

• Picking 2 crayons from a box at the same time (simultaneously) 

• Picking an earring, replacing it, then picking a 2nd earring

A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt?

• 1/3

• 1/7

• 1/9

• 1/12

If I roll a die 30 times, it should land on '4' five times. Is this an example of theoretical or experimental probability?

• Theoretical

• Experimental

When would you expect the experimental probability to get CLOSER to the theoretical probability?

• There's no way to expect this to happen.

• The fewer number of trials performed.

• The more trials performed.

Probability can be written as ...

• a fraction

• a decimal

• a percent

• all of the above

Probability is ...

• the chance that some event will occur.

• a game that involves coins.

• a guarantee.

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

• 30%

• 70%

• 100%

• 0%

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6

• 1/2

• 1/3

• 1/6