Two unbiased coin are tossed .What is the probability of getting at most one head?

LohaHridoy
  1. $$\frac{{1}}{{4}}$$
  2. 2
  3. $$\frac{{3}}{{4}}$$
  4. 1

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Answer: Option 3

Sample space (All [possible outcomes)S=(HH, HT, TH, TT) Event(required outcomes) = (TT, HT, TH) $$\eqalign{ & {\text{p}}\left( {\text{E}} \right) = \frac{{{\text{n}}\left( {\text{E}} \right)}}{{{\text{n}}\left( {\text{S}} \right)}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{3}{4} \cr} $$

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