Three coins are tossed once. Find the probability of getting: exa… - Vidyadip

Question

Three coins are tossed once. Find the probability of getting: exactly two tails

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Answer

When three coins are tossed then total outcomes S = {HHH, HHT, HTH, THH, TTH, HTT, TTT, THT}
Where s is sample space and here n(S) = 8
Let A be the event of getting exactly 2 tails
n(A) = 3
P(getting exactly 2 tails) = P(A) = $\frac{\mathrm{n}(\mathrm{A})}{\mathrm{n}(\mathrm{S})}=\frac{3}{\mathrm{8}}$

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