Permutations If P(n,r) (where r ≤ n) is the number of permutations of n elements takes r at a time, them P(n,r) =
learn maths and leave the fear of it
Permutations If P(n,r) (where r ≤ n) is the number of permutations of n elements takes r at a time, them P(n,r) =
Recent Comments