A shelf contains 3 different Hindi books `(H_1,H_2,H_3)` and 2 different Sanskrit books `(S_1,S_2)`. The number of ways to select one book of any language either Hindi or sanskrit is (3+2) i.e., ways. The 5 ways are `H_1,H_2,H_3,S_1,S_2`

In a shelf there are 3 different Hindi books and 2 different Sanskrit books. A student can select a Hindi Book and a Telugu book in 3xx2=6 ways as explained below. Let the Hindi books be H_1,H_2,H_3 and Sanskrit books be S_1,S_2 . The six selections are H_1S_1,H_1S_2,H_2S_1,H_2S_2,H_3S_1,H_3S_2

There are 3 copies of each of 4 different books . The number of ways that they can be arranged in a shelf is

If a man has 3 different coloured plants and 3 different coloured shirts. The number of ways that he can select a pair (I,e. one pant and one shirt is 3xx3=9 as explained below. Let the plants be P_1P_2,P_3 and shirts be S_1,S_2,S_3 . He can select a pair from the following P_1S_1,P_1S_2,P_1S_3,P_2S_1,P_2S_2,P_2S_3,P_3S_1,P_3S_1,P_3P_2,P_3P_3 ., 9 ways.

Find the number of ways of selecting 4 English, 3 Telugu and 2 Hindi books out of 7 English, 6 Telugu and 5 Hindi books.

There are 4 copies (alike) each of 3 different books. Find the number of ways of arranging these 12 books in a shelf in single row.

""_1^1H, ""_1^2H and ""_1^3H differ in their

The number of ways of dividing 10 books into 3 group of 5,3,2, books respectively is

Find the number of ways of arranging 5 different mathematics books, 4 different Physics books and 3 different chemistry books such that the books of the same subject are together.

Why the bond angles in H_(2)O & H_(2)S are different ? Give reason.

The number of ways that 3 English , 3 hindi & Telugu books can be chosen from a shelf containing 5 English , 4 hindi and 3 Telugu books is