Question

From a word abcd , how many ways are there to form permutation and combination of the world

Answer 1

Answer:

the answer for the question is 24 , 4

Answer 2

Answer:

The total possible arrangement of letters a b c d is 24.

Step-by-step explanation:

4!=24

As we all know letters a b c d can be arranged in 4!

4!=4×3×2×1

⇒4!=24

In order to calculate neither a & b

nor c & d

come together first we calculate the cases when a & b

comes together and c & d

together.

So, take a & b

as one entity so we have total 3 letters.

⇒ 3 letters can be arranged in 3!

and a & b

itself arranged in 2!

⇒ The case when a & b

comes together then letters can be arranged in 3!×2!

=3×2×1×2×1=12