In a hurdle race a player has to cross 10 hurdles. The probability that will clear each hurdle is (5/6). what is the probability that he will knock down fewer than 2 hurdles.

n = 10, q = probability that he will clear each hurdle = 5/6

p = probability that he will knock down = 1 - 5/6 = 1/6

Therefore, p (knocking down fewer than 2 hurdles) = p (0) + p (1)