find the number of 4 letter words that can be made using the alphabets if repetition of a letter is not allowed.

Find the number of 4 letter words that can be made using the alphabets, if repetition of a letter is not allowed. => 1 3 1 1 ! or 2 6 ! 2 2 ! or 1 3 1 1 or 2 6 ! 4 !..

The following are the steps to solve a system of linear equations using Cramer's rule. Step 1: Find the value of the determinant Step 2: If D 0, then the system has unique solution, given by Where D 1 , D 2 and D 3 are the determinants obtained from D by replacing respectively t..

Matrices - Consider the arrangement In this arrangement, there are two rows and four columns. The number 3 lies in the 2 n d row and 4 t h column. Each number has a fixed position. Matrix A has 2 rows and 3 columns and is thus of order 2 x 3. Matrix B has 3 r..

Question: Express the following sets in set builder form. (i) Set A consists of the letters p, q, r, s and t (ii) Set C = {1,3,5,7,....} (iii) Set D = {8} Answer: ..

It is a rectangular array of numbers, arranged in rows and columns. The number of rows (say m) and the number of columns (say n) determine the order of the matrix. It is written as m x n (to be read as m by n). The plural of matrix is matrices. Matrix is usually denot..

How many 2 letter words can be made using the English alphabets, if repetition of a letter is not allowed? => 13 or 2 6 ! 2 4 ! or 2 ! 2 6 ! or 52..

Find the number of ways of forming a password with 4 letters and 4 digits to create a mail id (repetition not allowed). => 26 C 4 x 10 C 4 x 8! or 26 C 4 x 10 C 4 or 26 P 4 x 10 P..

An automobile license plate consists of 2 letters followed by 4 digits. How many different plates can be made if repetitions are not allowed? => 3276000 or 676000 or 6760000 or 5760000..

How many 4 letter permutations can be made from the set {B, O, U, N, C, E} so that they all start with the letter B, and repetition of a letter is not allowed? => 60 or 20 or 30 or 24..

How many meaningful 4-letter words are there in the list of all possible arrangements of the letters in the word EARN, if each letter is used only once? => 5 or 1 or 3 or 2..