Entry Tip: Enter your answers fractions (not percents)
A coin fair is flipped 2 times.
What is the probability of 2 heads?  
What is the probability of 2 tails?  
What is the probability of first a head, then a tail?  
What is the probability of first a tail, then a head?  
What is the probability of 1 head and 1 tail, in any order?