Question

Find the number of permutations of the first eight letters of the alphabet taking four letters at a time

Answer 1

The formula for permutations is -
\[nPr = n!/(n-r)!\]

So "n" we can substitute as 8 and "r" we can substitute as 4
Subsitute wherever you can
Which will then get us:
\[8!/4!\]
We can then solve this and we will get 1680 different possibilities