The probability that a student is not a swimmer is 1/5. Then the probability that one of the five students, four are swimmers is:
Correct Answer : C
What is the probability of getting a sum 9 from two throws of a dice?
Sum of digits of a 5 digit number is 41. Find the probability that such a number is divisible by 11?
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?