Regular Probability
Binomial
Geometric
Normal Distribution
Potpourri
100
The probability a student takes AP Statistics and AP Environmental Science is .05. The probability a student takes AP Statistics is .18. What is the probability a student takes AP Environmental Science given that the student takes AP Statistics?
What is .2778
P(AP Environmental Science l AP Statistics) =
P(AP Environmental Science and AP Statistics) / P(AP Statistics)
100
The probability a family owns a dog is .40. There are 10 houses on a street. The probability half of the families own a dog is...
What is .2007
100
The probability you find a defective bag of popcorn is .02. What is the probability the first defective bag will be the 10th bag?
What is .0167
100
Freshman GPAs at Dodgeland High School have a mean of 2.93 and standard devation of .39. What is the probability a student has a GPA of between 2 and 3?
What is .5627
100
Given a normal distribution with a mean of 70 and a standard deviation of 4.5, what is the probability a value is between 60 and 85?
0.986
200
A car comes in 3 different body styles and 5 different colors. How many possible options are there?
What is 15
200
The probability someone makes an 5 in AP statistics test is .15. Ms. Righter teaches 30 students. What is the probability at no more than 10 students make an 5?
What is .997
200
The probability John wears a green shirt is .05. What is the probability it will take him a month or less (assume 30 days) to wear a green shirt?
What is .7854
200
The class average on a test was 78 with a standard deviation of 12 points. What is probability a student got 70% or less?
What is .2525
200
In a certain game of chance, your chances of winning are 0.2. If you play the game five times and outcomes are independent, what is the probability you win all five times?
What is .00032
300
How many ways can I choose 8 papers to grade out of a class of 30 students?
What is 5852925
300
The probability Bob orders dessert at a restaurant is .11. He goes out to eat once a week. What is the probability he orders dessert at least 5 times in a year?
What is .6904
300
The probability it rains is .21. Assuming independence, on average, how many days until it rains?
What is 4.76 days
300
An average female is 5'4'' (64 inches). The standard deviation for average female heights is 2.5 inches. Madee is 5'6". What percentage of women are taller than her?
What is 21.19%
300
It has been estimated that about 30% of frozen chickens contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 12 frozen chickens. Find the probability that the consumer buys exactly 4 contaminated chickens.
0.231
400
If I am rolling two fair dice, what is the probability that the sum of my roll is 8?
What is 5/36 or 0.138
400
The probability it will rain any given day is .21. Assuming independence, what is the probability it will rain more than 5 days this week?
What is .00049
400
The probability Logan gets a hit is .15. What is the probability it takes him at least 5 at bats to get a hit?
What is .5221
400
The average person has 3.64 car collision claims in their lifetime with a standard deviation of 1.11. If Anna is in the bottom 20% of claims, how many claims has Anna had?
Okay: What is 2.71 accidents?
Better: What is 2 accidents?
400
A quarterback completes 44% of his passes. It is the beginning of football season, and he has not played any games yet. Let X = the number of passes the quarterback throws until he completes a pass. What is the probability that the quarterback does not complete a pass until his 5th pass of the season?
0.043
500
If Caroline rolls a die and it shows 4 she wins $2. If it shows anything else, she loses $.50. What is her expected value?
What is $-.08
500
The probability you will have a tire blowout is .015. What is the probability you will have between 1 and 3 blowouts this week (school week)?
What is .0728.
500
The probability the cafeteria serves fish sticks is .03. What is the probability it will take them more than 10 days to serve fish sticks?
What is .7374
500
Daily Double!
What is my cat named after?
Dr. Pepper Kittywizard
500
An agent sells life insurance policies to five equally aged, healthy people. According to recent data, the probability of a person living in these conditions for 30 years or more is 2/3. Calculate the probability that after 30 years at least three people are still living.
1-binomialcdf(5,2/3,2) = 0.790