# 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.

# 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.

# 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.

# Counting: The Number of 4 Letter Codes from 6 Letters with Various Conditions

The video explains how to determine the number of 4 letter codes using 6 letters under various conditions.

# Ex 2: Determine the Number of Permuations With Repeated Items

This video explains how to determine the number of permutations when there are indistinguishable items.