Box 1 contains six block lettered A,B,C,D,E and F. Box 2 contains four blocks lettered W,X,Y and Z. How many five letters codewords can be formed by using three blocks from box 1 and two blocks from box2?

In how many ways can 3 letters be posted in 2 letter boxes?

Box A contains 3 red and 2 black balls.Box B contains 2 red and 3 black balls.One ball is drawn at random from box A and placed in box B.Then one ball is drawn at random from the box B and placed in A.The probability that the composition of balls in the two boxes remains unaltered is

Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls.Out of the setwo boxes one is selected at random and the probability of choosing box A is double that of box B.If a red ball is drawn from the selected box,then the probability that it has come from box B is

A box contains 3 balck and 4 red balls. Another box contains 2 black and 3 red balls, Balls are taken from these boxes, mixed and kept in a third box. Now two balls are chosen from the third box at random. What is the probability that one of them is black and the other red?

Box I contains two white and three black balls. Box II contains four white and one black balls and box III contains three white and four black balls. A dice having three red, two yellow and one green face is thrown to select the box. If red face turns up, we pick up box I, if a yellow face turns up we pick up box II otherwise we pick up box III Then we draw a ball from the selected box If the ball drawn is white what is the probability that the dice had turned up with a red face

Study the given information carefully and answer the questions given below. Ten boxes P, Q, R, S, T, A, B, C, D and E are arranged in a stack from top to bottom (where the one at the bottom is numbered as 1 and the one at the top is numbered as 10 ) but not necessarily in the same order. Boxes which are kept at even-numbered position contain different fruits such as apple, pear, orange, litchi and kiwi. Two boxes are kept between the box which contains orange and Box A. The box which contains orange is kept at either 8^(th) or 10^(th) position in the stack. Box R is kept above Box P but below Box S. Total number of boxes which contain fruits below and above the box which contains kiwi is the same. Box A is above Box T but not immediately above. The number of boxes kept between box A and Box T is same as the number of boxes kept between box T and Box D. The box which contains pear is kept above the box which contains litchi. Box C is kept immediately above Box Q. Only three boxes are kept between box E and Box D where Box E is kept above box D. Box D doesn’t contain Kiwi. The box which contains apple is kept below Box T but not immediately below. Neither box R nor box Q contains Pear. Box B contains apple. The box which contains orange is not kept immediately above Box E. How many boxes are kept between Box C and the box which is kept at fourth from the bottom?

Study the following information carefully and answer the given questions. Eight boxes i.e. K, L, M, N, O, P, Q and R kept one above the other. All the boxes are arranged from top to bottom in a stack. Each box contains different colour i.e. Blue, Red, Black, Orange, Yellow, White, Green and Purple. All the information is not necessarily in the same order. Three boxes are kept between box L and box R which is kept above box L. Box O does not contain Yellow colour. Two boxes are kept between the box which contains Red colour and M. The number of boxes is kept above the one which contains Red colour is same as the number of boxes is kept below the one which contains Black colour. The box which contains Black colour is not kept adjacent to box K. Three boxes are kept between those which contain Black colour and Purple colour. Box N is kept one of the boxes above the one which contains Orange colour. Box Q is kept just above the box which contains Purple colour. Not more than two boxes are kept above the box which contains Red colour. More than two boxes are kept between box Q and box K. The box which contains Blue colour is kept just above the one which contains Green colour. Three boxes are kept between the box which contains Blue colour and the box O. Two boxes are kept between the box K and the box which contains White colour. More than two boxes are kept between the box N and the box which contains Yellow colour. How many boxes are kept between the box Q and the one which contains Yellow colour?