Freshers India

(e) If three balls are randomly drawn from the bag, then what is the probability that atleast 1 is Red.                         

(f) If three balls are randomly drawn from the bag, then what is the probability that none is Blue.                         

(g) If three balls are randomly drawn from the bag, then what is the probability that one is Blue and other 2 are of other than Blue.                         

The number of ways of arranging n students in a row such that no two boys sit together and no two girls sit together is m(m > 100). If one more student is added, then number of ways of arranging as above increases by 200%. The value of n is