Six X's have to be placed in the squares of the figure below, such that each row contains atleast one X,

this can be done in

Six cards and six envelopes are numbered 1, 2, 3, 4, 5, 6 and cards are to be placed in envelopes so that each envelope contains exactly one card and no card is placed in the envelope bearing the same number and moreover cards numbered 1 is always placed in envelope numbered 2. Then the number of ways it can be done is a. 264 b. 265 c. 53 d. 67

m' men and 'n' women are to be seated in a row so that no two women sit next to each other. If mgen then the number of ways in which this can be done is

Six apples and six mangoes are to be distributed among ten boys so that each boy receives at least one fruit. Find the number ways in which the fruits can be distributed.

The number of ways in which the letters of the word PERSON can placed in the squares of the given figure so that no row remains empty is

Four letters, two 'a' and two 'b' are filled into 16 cells of a matrix as given. It is required that each cell contains atmost one letter and each row or column cannot contain same letters. Then the number of ways the matrix can be filled is

The figure given below shows a small part of human lung where exchange of gas take, place. In which are of the options given below, the one part A, B, C and D is correctly, identified along with its function?

Given below is the sketch of a plant for carrying out a process. (i) Name the process occuring in the above plant. (ii) To which containeer does the net flow of solvent take place ? (iii) Name one SPM which can be used in this plant. (iv) Give one practical use of the plant.

Find the values of a for which sin^(-1)x=|x-a| will have at least one solution.

Find the number of ways in which A A A B B B can be places in the square of fig as shown, so that no row remains empty. fig

Three particles, each having a charge of 10 muC , are placed at the vertices of an equilateral triangle of side 10 cm. Find the work done by a person in pulling them apart to infinite separations.