Khan Academy
Khan Academy: Conditional Probability and Combinations
Probability that I picked a fair coin given that I flipped 4 heads out of 6 tosses.
Khan Academy
Khan Academy: Combination Example: 9 Card Hands
Thinking about how many ways we can construct a hand of 9 cards.
Khan Academy
Khan Academy: Does Order Matter?
This video [1:52] mathematically answers the question "Does order matter?" when creating casts. To keep order from mattering, we need to take the total number of combinations where order does matter and divide that by all the possible...
Khan Academy
Khan Academy: 4. Casting Problem
Now it's time for a really meaty problem! How can we count the number of possible casts when given a large set of robots to choose from?
Khan Academy
Khan Academy: 2. Snake Bots
Let's build some snakes to get us thinking about permutations.
Khan Academy
Khan Academy: 3. Tree Challenge
How can trees be combined to count robots with many parts?
Khan Academy
Khan Academy: 2. Robot Combinations
Let's review the multiplication principle which allows us to quickly count the number of possible robots.
Khan Academy
Khan Academy: 4. Counting With Trees
Tree diagrams allow us to visualize these counting problems using any number of parts.
Khan Academy
Khan Academy: Ways to Arrange Colors
Thinking about how many ways you can pick four colors from a group of 6.
Khan Academy
Khan Academy: Permutation Formula
Sal explains the permutation formula and how to use it.
Khan Academy
Khan Academy: Factorial and Counting Seat Arrangements
Sal explains a tricky factorial problem about counting seat arrangements.
Khan Academy
Khan Academy: Example: Different Ways to Pick Officers
Thinking about the different ways we can pick officers in order to find the probability of one situation in particular.
Khan Academy
Khan Academy: Probability & Combinations (2 of 2)
Making at least 3 out of 5 free throws.
Khan Academy
Khan Academy: Possible Three Letter Words
Sal explains how to find all of the possible three letter words when we can use each letter as many times as we want, and when each letter can only be used once.
Khan Academy
Khan Academy: Ways to Pick Officers
How many ways can we pick officers for our organization?
Khan Academy
Khan Academy: 5. Does Order Matter?
Why do we divide the number of combinations by the number of permutations?
Sophia Learning
Sophia: Factorials: Lesson 3
This lesson introduces factorials and their relationship to permutations. It is 3 of 5 in the series titled "Factorials."
Sophia Learning
Sophia: Factorials: Lesson 5
This lesson introduces factorials and their relationship to permutations. It is 5 of 5 in the series titled "Factorials."
Sophia Learning
Sophia: Finding Probability Using Combinations: Lesson 1
This lesson demonstrates how to determine probability using combinations. It is 1 of 7 in the series titled "Finding Probability Using Combinations." [3:31]
Sophia Learning
Sophia: Finding Probability Using Combinations: Lesson 7
This lesson demonstrates how to determine probability using combinations. It is 7 of 7 in the series titled "Finding Probability Using Combinations." [4:31]