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CBSE Class 12-science Answered

In a hurdle race, a player has to cross 12 hurdles. The probability that he will clear each hurdle is 2/3. What is the probability that he will knock down fewer than 2 hurdles
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

There are 12 hurdles in all i.e. n = 12

Probability of a hurdle cleared = 2/3
Probability that he does not clear the hurdle = 1 – 2/3 = 1/3
P(knock down fewer than 2 hurdles)
= P(He will cross all hurdles) + P(He will not cross 1 hurdle)
Answered by | 04 Jun, 2014, 03:23: PM

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