question_answer 1)

In a hurdle race, a player has to cross 10 hurdles. The probability that he will clear each hurdle is  What is the probability that he will knock down fewer than 2 hurdles ?  

Answer:

Here n = 10,       P = probability that the player       will clear each hurdle             P (he will knows down fewer than 2 hurdles)       = P(he will clear more than (10 -2) = 8 hurdles)       = P(x = 9) + P(x = 10)             (Using binomial distribution)