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Question
A game consists of tossing a one-rupee coin three times, and noting its outcome each time. Find the probability of getting three heads.
Solution
When a coin is tossed three times, all possible outcomes are
HHH, HHT, HTH, THH, HTT, THT, TTH and TTT.
Number of total outcomes = 8.
Outcome with three heads is HHH.
Number of outcomes with three heads = 1.
∴ P(getting three heads) =`("Number of favourable outcomes")/"Number of all possible outcomes"`
`= 1/8`
Thus, the probability of getting three heads is `1/8`.
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