suppose 2 nickles are tossed at the same time what are the possible outcomes?
what are the possiblility of getting
a)2 heads
b)2 tails
c)1 head and 1 tail
Four possible outcomes:
HH HT TH TT
prob(HH) = 1/4
prob(TT) = 1/4
prob (TH or HT) = 2/4 = 1/2
notice the 3 answers add up to 1, since one of those possibilities must happen