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220. Three unbiased coins are tossed. What is the probability of getting all heads?Ops: A. O 3/8B. O 2/9C. O 1/8D. O None of the mentioned options​

Answer»

ANSWER:

E1={HHH} and, therefore, n(E1)=1. ∴ P (getting all HEADS) =P(E1)=n(E1)n(S)=18



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