Question 1110569
Look at the 8 possible outcomes and tally the number of heads,
HHH-3
HHT-2
HTH-2
HTT-1
THH-2
THT-1
TTH-1
TTT-0
.
.
3 heads - 1
2 heads - 3
1 head  - 3
0 heads - 1
.
.
.
*[illustration grid.JPG].