Prove Equation 1.2-2. Hint: First select n1 positions in ways, Then select n2 from the remaining n - n1 position in ways and so on. Finally, use the multiplication rule.
Step 1 of 1 :
The claim is to prove =
We have, positions in ways and then select from the n - ways
We have to use the multiplication rule.
We have to arrange n objects
can place ways
And can place ways
Hence the proof