Probability

A box contains 4 red pencils, 6 blue pencils, 5 black pencils, and 3 green pencils. The best description of the likelihood of selecting a blue pencil at random from the box is ​​​ (a)   . ​ ​

• unlikely
• impossible
• equally likely
• likely
• certain

Probability is ...

• the chance that some event will occur.
• a game that involves coins.
• a guarantee.

Which of the following best describes the likelihood of the spinner landing on a number less than 6?

• impossible

• unlikely

• equally likely

• likely

• certain

Joseph rolled a number cube 50 times. The table shows the cumulative results of each roll. What is the relative frequency of rolling a 4? Select all that apply.

• 0.18

• 67.7%

• 18%

Tags

CCSS.8.SP.A.4

During the first several rounds of a golf league, Anthony made par or better on 32 out of 80 holes. Based on this relative frequency, how many pars or better could he be expected to make on the remaining 160 holes?

• 54 pars or better

• 60 pars or better

• 64 pars or better

• 70 pars or better

Tags

CCSS.8.EE.B.5

CCSS.8.F.B.4

CCSS.8.SP.A.3

A deli offers the types of bread and sandwiches shown in the table. How many possible outcomes are there?

Tags

CCSS.8.F.A.1

If you toss a coin 10 times and get tails each time, which of the following is true?

• The probability of getting a tails on the next toss is greater than the probability of getting a heads.

Papa Johns wants to determine how often it delivers to three different areas of Twinsburg. The table shows the areas from a random sample of 80 deliveries. Based on this data, if the driver makes 200 deliveries, how many will be to the southern area of Twinsburg?

• 35

• 55

• 80

• 110

Tags

CCSS.8.EE.B.5

CCSS.8.F.B.4

CCSS.8.SP.A.3

A regular 6-sided die is to be rolled once. What is the probability that a number less than 3 is rolled?

• 1/3

• 1/6

• 1/2

• 2/3

A spinner has 8 equal regions. Each region is marked with one of the following numbers: 10, 20, 30, 40, 50, 60, 70, 80. What is the probability of an even number being spun on the first roll?

• 1/8

• 1/2

• 1

• 3/8