Practice problem
Multiplication Counting Principle
I flip the same coin times and record the sequence. Every time I flip a head, I write down an and every time I flip a tail I write down a . How many different sequences can I possibly write?
Practice problem
I flip the same coin times and record the sequence. Every time I flip a head, I write down an and every time I flip a tail I write down a . How many different sequences can I possibly write?