How many types of matrices can be formed from 8 elements ?

How many types of matrices can be formed from 11 elements ?

How many 5-member commitees can be formed from 8 teachers and 3 students so that a particular teacher is always selected for each committee?

Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.

How many different teams of 11 players can be formed out of 17 players?

How many numbers of four digit can be formed out the digits 1,2,3,4,5,6 without repitition of digits?

In a plane 10 straight lines are such that no two of these are parallel and no there of them are concerned.How many triangles can be formed by these lines?

Find how many words can be formed of the letters of the words: FAILURE so that the vowels may never seperated.

Find how many words can be formed of the letters of the words: DAUGHTER so that the vowels may never seperated.