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Book: RS Aggarwal - MathematicsChapter: 31. ProbabilitySubject: Maths - Class 11thQ. No. 9 B of Exercise 31AListen NCERT Audio Books to boost your productivity and retention power by 2X. 9 B Three unbiased coins are tossed once. Find the probability of getting exactly one tail We know that, Probability of occurrence of an event Let T be tails and H be heads Total possible outcomes = TTT, TTH, THT, HTT, THH, HTH, HHT, HHH Desired outcomes are exactly one tail. So, desired outputs are THH, HTH, HHT Total no.of outcomes are 8 and desired outcomes are 3 Therefore, the probability of getting exactly one tail
Conclusion: Probability of getting exactly one tail is Chapter ExercisesMore Exercise QuestionsLast updated date: 31st Dec 2022 • Total views: 228.6k • Views today: 22.80k Answer Verified
Hint: Formula Used: Complete step by step
solution: 2) Two heads 3) All heads 4) At least two heads 5) At least one head and one tail $ \Rightarrow P\left( E \right) = \dfrac{6}{8} = \dfrac{3}{4}$ Note: What is the probability of getting atleast one tail if three unbiased coins are tossed?Explanation: Probability of NOT getting a tail in 3 coin toss is (12)3=18 . Probability of getting at least 1 tail in 3 coin toss is 1−18=78 .
When 3 unbiased coins are tossed once getting at least 1 head?Probability of getting at least one head 1−81=87.
When 3 unbiased coins are tossed together once what is the probability of?For fairly tossed fair coins the number of possible outcomes = 2^3 =8. They are: TTT, HTT, THT, TTH, HHT, HTH, THH, HHH. (i) Getting 3H…..1 way. Probability = 1/8.
When 3 unbiased coins are tossed?Probability of getting no head = 3/8.
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