Question 969341
Tree diagram helps but doesn't project easily.

The first coin toss has 
HT

The next has HT for each.
After two tosses, There are HH HT TH TT


The third toss has two outcomes for each of the 4.  Notice how the third is HT all the way down.

HHH
HHT
HTH
HTT
THH
THT
TTH
TTT


              
There are 8 different outcomes.

There is 1 outcome with all heads; 1 outcome with all tails
There are 3 outcomes with 2 heads; 3 outcomes with 2 tails.