how many different 4 letter non meaningful words can be formed by using the letters r e a and d if each letter is used only once?

How many different 4-letter non-meaningful words can be formed by using the letters R, E, A and D, if each letter is used only once? => 24 or 3 or 21..

How many different 4-letter permutations can be formed using the letters in the word 'united' exactly once? => 360 or 15 or 720 or 24..

How many different 4-letter permutations can be formed from the letters in the word 'united'? => 720 or 360 or 15 or 24..

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..

Using counting principle, find the number of three-letter permutations of the six letters S, P, R, I, T and E. => 120 or 60 or 90 or 100..

The percent of words of 1 to 10 letters used in articles in popular fiction story book is recorded as shown. Length 1 2 3 4 5 6 7 8 9 10 Percent 3.6 14.8 18.7 16.0 12.5 8.2 8.1 5.9 4.4 2.1 Describe the shape of the distribution. => uniform or left -..

'>Framing of Formulae A formula is formed by using: (a) mathematical symbols and variables (b) given conditions, and (c) simplification. Indices If m is a positive integer, a x a x a .... m times is written as am. a is called the base and m is the power. We read it as "a raised ..

[A i j ] where A i j is the co-factor of the element a i j . Adjoint of A is denoted by Adj A. Note that the concept of adj is only for square matrix. A square matrix A is said to be non-singular if |A| 0. Let A be a square matrix of order n. If there exists a square matrix B of order n, ..

[A i j ] where A i j is the co-factor of the element a i j . Adjoint of A is denoted by Adj A. Note that the concept of adj is only for square matrix. A square matrix A is said to be non-singular if |A| 0. Let A be a square matrix of order n. If there exists a square matrix B of order n, ..

to q is the side AB. The hypotenuse of the D ABC is the side AC. Now, let us write down the trigonometrical ratios with the help of the above triangles: (i) Sine q : It is defined as the ratio of the side opposite to q and the hypotenuse. i.e., In short we write sin (ii) Cosine ..