Coloured balls are distributed in four boxes as shown in the following table: A box is selected at random and then a ball is randomly drawn from the selected box. The colour of the ball is black, what is the probability that ball drawn is from t

(i) Coloured balls are distributed in three bags as shown in the following table : A bag is selected at random and then two balls are randomly drawn from the selected bag. They happen to be black and red. Find the probability that they come from bag I ? (ii) Three bags contain balls as shown in the table below : A bag is chosen at random and two balls are drawn from it. They happen to be white and red. What is the from it. They happen to be white and red. What is the probability that they come from the III bag ?

A box contains 20 red and 15 black balls. Two balls are drawn from the box one after the other without replacement. What is the probability that both drawn balls are red ?

A box contains 5 red balls, 8 green balls and 10 pink balls. A ball is drawn at random from the box. What is the probability that the ball drawn is either red or green?

A box contains 10 white,6 red and 10 black balls.A ball is drawn at random from the box. What is the probability that the ball drawn is either white or red?

A bag contains 2 white and 4 black balls while another bag contains 6 white and 4 black balls.A bag is selected at random and a ball is drawn If X be the probability that the ball drawn is of white colour and (i be the probability that the ball drawn is black colour, then

Let n_1, and n_2, be the number of red and black balls, respectively, in box I. Let n_3 and n_4,be the number one red and b of red and black balls, respectively, in box II. One of the two boxes, box I and box II, was selected at random and a ball was drawn randomly out of this box. The ball was found to be red. If the probablity that this red ball was drawn from box II is 1/3 then the correct option(s) with the possible values of n_1, n_2, n_3, and n_4, is(are)

A box contains 3 white and 2 balck balls. Two balls are drawn at random one after the other. If the balls are not replaced. What is the probability that both the balls are black.?