Question 934983
<pre>

                         Heads
Tosses  No. of  No. of   minus
         heads   tails   tails   Prob.
HHH       3        0       3      1/8
HHT       2        1       1      1/8
HTH       2        1       1      1/8
HTT       1        2      -1      1/8
THH       2        1       1      1/8 
THT       1        2      -1      1/8
TTH       1        2      -1      1/8
TTT       0        3      -3      1/8

P(-3) = 1/8
P(-1) = 3/8
P(1)  = 3/8
P(3)  = 1/8

Edwin</pre>