Question

A coin is tossed 8 times.Find the probability of getting exactly 3 tails.Step by Step.​

Answer 1

Answer:

Sample space (S) = {h¹,h²,h³,h⁴,h⁵,h⁶,h⁷,h⁸,t¹,t²,t³,t⁴,t⁵,t⁶,t⁷,t⁸}

n(S) = 16

Let event A be the probability of getting exactly 3 Tails :-

A = {t¹,t²,t³,t⁴,t⁵,t⁶,t⁷,t⁸}

n(A) = 8

P(A) = n(A)/n(S) = 8/16 = 1/2

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