Review Unit 7: Probability and Z-Scores

A spinner is divided into five colored sections that are not of equal size: red, blue, green, yellow, and purple. The spinner is spun several times, and the results are recorded.

Based on these results, express the probability that the next spin will land on purple as a fraction in simplest form.

In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. Aaron sets up a website where players can buy and sell these costumes online. Information about the number of people who visited the website and the number of costumes purchased in a single day is listed below.

• 38 visitors purchased no costume.

• 239 visitors purchased exactly one costume.

• 12 visitors purchased more than one costume.

Based on these results, express the probability that the next person will purchase no costume as a decimal to the nearest hundredth.

Qasim has a bag that contains pineapple chews, lemon chews, and lime chews. He performs an experiment. Qasim randomly removes a chew from the bag, records the result, and returns the chew to the bag. Qasim performs the experiment 52 times. The results are shown below:

• A pineapple chew was selected 33 times.

• A lemon chew was selected 9 times.

• A lime chew was selected 10 times.

Based on these results, express the probability that the next chew Qasim removes from the bag will be lemon chew as a percent to the nearest whole number.

Jason owns a small business selling bagels. He knows that in the last week 45 customers paid cash, 8 customers used a debit card, and 6 customers used a credit card.

Based on these results, express the probability that the next customer will pay with a credit card as a decimal to the nearest hundredth.

A spinner is divided into five colored sections that are not of equal size: red, blue, green, yellow, and purple. The spinner is spun several times, and the results are recorded.

Based on these results, express the probability that the next spin will land on red or green or yellow as a decimal to the nearest hundredth.

In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. John sets up a website where players can buy and sell these costumes online. Information about the number of people who visited the website and the number of costumes purchased in a single day is listed below.

• 387 visitors purchased no costume.

• 71 visitors purchased exactly one costume.

• 17 visitors purchased more than one costume.

Based on these results, express the probability that the next person will purchase one or more costumes as a decimal to the nearest hundredth.

Myesha has a bag that contains orange chews, lemon chews, and lime chews. She performs an experiment. Myesha randomly removes a chew from the bag, records the result, and returns the chew to the bag. Myesha performs the experiment 17 times. The results are shown below:

• A orange chew was selected 12 times.

• A lemon chew was selected 2 times.

• A lime chew was selected 3 times.

Based on these results, express the probability that the next chew Myesha removes from the bag will be a flavor other than lime as a percent to the nearest whole number.

In a certain Algebra 2 class of 28 students, 11 of them play basketball and 16 of them play baseball. There are 10 students who play neither sport. What is the probability that a student chosen randomly from the class plays both basketball and baseball?

There is a spinner with 15 equal areas, numbered 1 through 15. If the spinner is spun one time, what is the probability that the result is a multiple of 5 or a multiple of 2?

In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student who does not have a dog has a cat?