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प्रश्न
A coin is tossed thrice. What is the probability of getting two consecutive tails?
उत्तर
Sample space = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
n(S) = 8
Let A be the event of getting consecutive tails
A = {HTT, TTH, TTT}
n(A) = 3
P(A) = `("n"("A"))/("n"("S")) = 3/8`
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