Probability with And/Or
In an art class of 27 students, 15 of them are doing the mural and 14 of them are not doing the mural. There are 9 students who are doing both the mural and the play. What is the probability that a student chosen randomly from the class is doing the mural or doing the play?
20/27
A person owns an ice cream store. They know that last week 43 customers chose vanilla, 18 customers chose mint, and 31 customers chose caramel. Based on these results, express the probability that the next customer will choose mint as a percent to the nearest whole number.
20%
A bag contains 5 orange marbles and some purple marbles. If the probability of drawing a purple marble is double that of an orange marble, then what is the number of purple marbles?
10
In your calculator: C(7,9)
0
In your calculator: P(4,3)
24
A baseball team of 23 students, 10 of them have colored hair and 9 of them have their ears pierced. There are 4 students who have colored hair and their ears pierced. What is the probability that a student chosen randomly from the class has colored hair or has their ears pierced?
15/23
A person sets up a website where people can buy stationery. Information about the number of people who visited the website and the number of stationery in a single day is listed below.
Based on these results, express the probability that the next person will purchase no stationery as a fraction in simplest form.
65/201
100 hotdogs are labeled from 1 to 100. Find the probability of eating a hotdog with a prime number.
1/4
In your calculator: C(6,5)
6
In your calculator: P(8,2)
56
There is a pizza cut into 15 equal areas, labeled 1 through 15. If the someone takes one slice of pizza, what is the probability that the remaining slices are a multiple of 3 and a multiple of 5?
1/15
A person has a bag that contains Twix, Milky Way, and Butterfinger. They perform an experiment. They performs the experiment 32 times.
Based on these results, express the probability that the next candy they remove from the bag will be a Milky Way as a decimal to the nearest hundredth.
0.63
A store contains 6 green, 5 purple and 4 orange shirts. Two shirts are bought, but the first shirt bought is not returned. Find P(green, then purple)
1/7
In your calculator: C(9,6)
84
In your calculator: P(6,1)
6