Expected Value
Probability
Combinations
100
You flip a coin. If it lands on heads, you get $20. If it lands on tails, you lose $20. What is the expected value of flipping the coin?
$0
100
What is the probability of choosing a green marble from a bag containing 5 red, 3 blue, and 6 green?
6/14 or 3/7
100
You flip a coin 5 times. How many total combinations of outcomes are there?
32 (2*2*2*2*2)
200
You flip a coin. If it lands on heads, you get $20. If it lands on tails, you lose $21. What is the expected value of flipping the coin?
- $0.50
200
Using the table, what is the probability that a person's highest level of education is a bachelor's degree, assuming they're a man?
463/1570
200
There are ten questions on a test. In how many ways can the questions be arranged?
3628800 (10!)
300
A raffle is held by YOFM to draw for a $1000 plasma television. Two thousand tickets are sold at $1.00 each. Find the expected value of one ticket.
$0.50
300
Using the table, what is the probability that a person is a woman, assuming that their highest level of education is 8th grade or less?
35/81
300
For a classwork that is 6 questions long, Mr. Thomas decides to randomly pick 3 random questions to grade. If Bobert only completed the first 5 questions, what are the odds he can still get a 100%?
50% or 1/2 or 3/6 or 60/120
400
A game consists of flipping two coins. If both coins turn up heads, you win $1.00. What is a "fair" price to pay to play?
$0.25
400
What is the probability of rolling a 7 on a pair of dice?
6/36 or 1/6
400
In how many ways can the questions on a ten question test be arranged if the easiest and hardest questions must remain next to each other?
725760 (9!*2)
500
A roulette wheel has 38 pockets, 18 red, 18 black, and 2 green. If you bet $10,000 on red, what is the expected value of your bet?
$9473.68
500
2 dice are rolled, one after another. What is the probability the second die lands on a higher value than the first?
15/36
500
In how many ways can the ten members of a volleyball team be lined up, if the team's three captains always have to be standing together?
241920 (8!*3!)