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Question
Three different coins are tossed together. Find the probability of getting at least two tails.
Solution
When three coins are tossed together, the possible outcomes are
HHH, HTH, HHT, THH, THT, TTH, HTT, TTT
∴ Total number of possible outcomes = 8
Favourable outcomes of at least two tails are THT, TTH, HTT, TTT
∴ Total number of favourable outcomes = 4
∴ P(at least two tails) =`4/8=1/2`
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