Permutations/Combinations
Richie
360
6 shirts, 4 pants, 3 boots
72
Bill and Mary are making cakes. 30% of the cakes burned. They made 40 cakes, what is the probability that 4 cakes weren't burned?
3.29
A jar contains 8 red balls, % green balls, and 10 yellow balls. $ balls are choosen from the Jar, with replacement. What's the probability that both balls are red?
64/529
You select one day of the month of February. What is the probability that you choose the 28th or 2nd day?
1/4
Out of 70 employees the boss is only choosing 17 to go on the conference.
7.9
Appetizer: Fries, Wings
Entree: Chicken, Steak, Hamburger
Desert: Cake, Icecream
12
A company produced chairs. Chairs successfully work 95% of the time. They're testing 50 chairs. What is the probability that at least 34 of the chairs successfully stand up.
.99
James has 4 dimes, 3 pennies, and 2 quarters in his pocket. If each coin is equally likely to be pulled out of his pocket in order without replacement, what is the probability that he will pull out 2 quarters in a row first?
1/36
A game has a spinner with numbers 1-9 on it. What is the probability that the spinner stops on an even number or a number greater than 6?
6/9
Order does matter
Permutation
You toss three dimes. How many possible outcomes are there?
8
3 cards a King, Queen, and Jack will be placed under a cup. The cup will be mixed up. If you choose the King you will win the most money. If you choose a Queen or Jack winning varies depending on the game you choose.
Player Slant
Pay $20
Win (K) $40
Win (Q) $30
Win (J) $25
11.66
Replaced
Independent
Mutually Exclusive Formula
P (a and b) = P (a) * P (b)
or
P (a or b) = P (a) + P (b)
Order dosent matter
Combinations
A wedding caterer gives you three choices for the main course, six starter choices and five options for dessert. How many different meals (made up of starter, dinner and dessert) are there?
90
3 cards a King, Queen, Jack will be placed under a cup and will be mixed up.
Fair Game
Pay $x
Win (K) $30
Win (Q) $20
Win (J) $x
$17
and
Dependent
Non Mutually Exclusive Formula
P (a or b) = P (a) + P (b) - P (a and b)
Permutation Calculator Steps
Calc - Insert # - Math - PRB - #2
Formula
_ * _ * _
"at least" x successes formula
1-binompdf (n,p,x-1)
A coiin is tossed and a single 6 sided die is rolled. Find the probabilty of landind on the head side of the coin and rolling 3 on the die.
1/12
For AND question you _____ each probability
For OR questions, ____ the probabilities
multiply
add