An urn contains 3 white, 4 red and 5 black balls. Two balls are drawn one by one without replacement. What is the probability that at least one ball is black?

An urn contains 3 white, 4 red and 5 black balls. Two balls re drawn one by one without replacement. What is the probability that at least one ball is black?

An urn contains 3 white, 4 red and 5 black balls. Two balls re drawn one by one without replacement. What is the probability that at least one ball is black?

A bag contains 5 white, 7 red and 8 black balls. Four balls are drawn one by one with replacement, what is the probability that at least one is white?

A bag contains 5 white,7 red and 8 black balls.Four balls are drawn one by one with replacement,what is the probability that at least one is white?

Two balls are drawn from an urn containing 3 white, 5 red and 2 black balls, one by one without replacement. What is the probability that at least one ball is red ?

Two balls are drawn from an urn containing 2 white , 3 red and 4 black balls , one by one without replacement . What is the probability that at least one ball is red ?

A bag contains 5 white, 7 red and 8 black balls. If four balls are drawn one by one without replacement, what is the probability that all are white?

A bag contains 7 red, 4 white and 5 black balls. If four balls are drawn one by one the replacement, what is the probability that atleast one is white?