Probability and Inferences

A uniform probability model is developed to demonstrate the probability of landing on a number on a spinner. What statements are true about the spinner?

• The spinner is evenly divided into sections. Each number is equally represented on the spinner.

• The spinner is divided into sections. Each number is represented a different amount of times.

• The spinner is divided into sections of different sizes. The spinner has the same amount of sections for each number.

• The spinner is divided into sections of different sizes and each number is represented a different amount of times.

A jar has 50 jolly ranchers. Each candy in the jar has the same probability of being selected. Which probability model shows the outcomes and their probabilities?

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Will is conducting an experiment where he spins a spinner and records the result. He conducted 40 trials in his experiment. The results are in the table.

If Will were to spin the spinner 175 times, approximately how many times could he expect to land on green?

• 11 times

• 51 times

• 48 times

• 26 times

James tossed a coin 60 times. The coin landed on tails 42 times and landed on heads 17 times. What is the relative frequency of landing on tails?

• 42

• 42%

• 0.07

• 70%

• 2

• 4

• 8

• 16

Jimmy is rolling a 1-6 number cube. Which statement is true?

• Jimmy is equally likely to roll a 5 as an even number.

• Jimmy is equally likely to roll a 1 as an odd number.

• Jimmy is more likely to roll a 6 than a 1.

• Jimmy is equally likely to roll an even number as an odd number.

An automobile dealer decides to select a month for its annual sale.  Find the probability that it will be September or October.

• 1/12

• 1/6

• 1/4

• 5/6

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

P(not A) =

*Remember to simplify.*

• 2/6

• 3/4

• 2/8

• 1/4

• 15,760

• 17,560

• 16,760

• 16,660