A bag contains 12 balls, out of them some are white (can be zero) and rest are black balls. All combinations of number of white and black balls are equally likely. Four balls are drawn at random from the bag without replacement. If the probability that all the four balls are black, is equal to λ, then the value of 50λ equals

A bag contains 12 balls, out of them some are white (can be zero) and

1.	A bag contains 12 balls, out of them some are white (can be zero) and rest are black balls. All combinations of number of white and black balls are equally likely. Four balls are drawn at random from the bag without replacement. If the probability that all the four balls are black, is equal to λ, then the value of 50λ equals
Answer» A bag contains 12 balls, out of them some are white (can be zero) and rest are black balls. All combinations of number of white and black balls are equally likely. Four balls are drawn at random from the bag without replacement. If the probability that all the four balls are black, is equal to $λ$ , then the value of $50 λ$ equals