Probability
Compound Probability
Random Samples
100
The probability of an event to occur is 0.14.
The best description of the likelihood of this event to occur is:
Unlikely
100
Arthur has a box that contains 4 red marbles and 3 green marbles. All of the marbles are the same size. Without looking inside the box, what is the probability he will draw a red marble from the box, and then, without replacing the first marble, draw another red marble?
(reduce your fraction!)
2/7
100
You want to give a survey to find out what the least favorite lunch is at Nevada Middle School. Which one of the following will give you a random sample?
A. Asking every 6th student that gets off the bus in the morning
B. Asking every 6th student in the hot lunch line.
C. Ask six randomly selected students from each of your classes
D. Ask six randomly selected students from each 1st period class
D. Ask six randomly selected students from each 1st-period class
200
likely
200
A dime is flipped twice in a row. What is the probability of getting heads on both flips?
1/4
200
Tim took a random handful of 20 jelly beans. The results are shown in the table. How many jelly beans in a sample of 500 are likely to be green?
175
300
A cooler contains 40 beverage cans: 8 lemonade, 20 soda, and 12 tea. Phil will select 1 can at random. What is the probability he will choose a can of lemonade?
8/40=1/5
300
1/256
300
Matt surveyed a random sample of 120 people at an airport, and 30 said they traveled more than an hour to the airport from their homes.
Based on the results of the survey, of the 300 total visitors at the airport, what is the expected number that traveled more than an hour from their homes?
A. 75
B. 105
C. 125
D. 150
A. 75
400
C. 75