# Probability of 3 letters With Repetition are Vowels

This video explains how to determine the probability that 3 randomly typed letters with repetition are all vowels.

# Probability of 4 letters With No Repetition are Vowels

This video explains how to determine the probability that 4 randomly typed letters without repetition are all vowels.

# Counting: Find the Number of 5 1 Digit Number Picks (Perm and Comb)

This video explains how to use the counting principle to determine the number of 5 digit number picks when order matters and doesn’t matter using a permutation and combination.

# Probability of 3 letters With No Repetition are Vowels

This video explains how to determine the probability that 3 randomly typed letters without repetition are all vowels.

# Probability of 6 Letters With No Repetition

This video explains how to determine the probability that 6 randomly typed letters have no repetition.

# Probability a 5 Digit PIN has No Repeated Digits

The video explains how to determine the number of 5 digit codes using the alphabet with and without repetition.

# Counting: The Number of 5 Letter Passwords With and Without Repetition

The video explains how to determine the number of 5 letter codes using the alphabet with and without repetition.