is it 50% or 100%
dang, i just confused myself.
what if you toss 3 coins all at the same time... what's the probability of getting a head then, is it > 100% ? Doh!
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50/50
Sample space for two coins tossed is: HH HT TH TT Therefore at most one head is HT TH TT or 3/4 or 0.75.
It is 0.75
the probability of getting one head and one tail on three flips of a coin is 1/9
When two fair coins are tossed, you have the following possible outcomes: HH, HT, TH, TT. So, at most implies that you get either i) zero heads or ii) one head. From the possible outcomes we see that 3 times we satisify the outcome. Thus, probability of at most one head is 3/4.