The tree diagram shows all the possible combinations for heads (H) and tails (T) when 3
coins are tossed. What is the probability that the outcome has at least two heads?
4
1st Coin
H
2nd Coin 3rd Coin Outcomes
HHH
HHT
HTH
HTT
THH
THT
TTH
TTT
H:
H
T
H
H
H