Probability Area Models

Which of the following methods is NOT a good tool for determining sample space?

• tree diagrams

• area models

• organized lists

• guess and check

A measurement of the likelihood of an event or events occurring on a scale of 0 to 1 is called - 

• data

• luck

• probability

• trials

Which of the following expressions would be used to calculate the complement of an event occurring?

• P(event) - 1

• P(event 1) x    P(event 2)

• P(event)/possible outcomes

• 1 - P(event)

Mr. Coffey has a basket full of fruit. Each of the 20 students in his class selects one piece of fruit from the basket without looking and puts it back in the basket. Based on the results shown, what can the students conclude about the probability of selecting an apple?

• There are no apples in the basket.

• There is about a 25% chance a student picks a fruit from the basket.

• It is more likely to pick an apple than it is to pick a pear.

• It is equally likely that a student will pick an apple.

An arts and craft supply store has a large crate that contains copper, brass, and silver beads. Several friends take turns picking a bead, recording the bead type, and placing the bead back into the crate. Based on the table, find P(copper) in simplest form.

• P(ball) = 1

Coach Claudia tells the class that a jar contains 300 marbles. Based on the table of marble colors after 60 draws, about how many green marbles are in the jar?

• 37

• 115

• 120

• 185

• 15

Use the spinner to find the probability.

P(not D) =

• 5

• 5/6

• 0.63

• 1/6

Use the spinner to find the probability.

P(2 or 3) =

• 1/4

• 3/8

• 2

• 2/4