Suppose that 5 identical red wooden blocks and 6 identical white wooden blocks are to be stacked, one on top of another, to form one tall tower of blocks. How many different colour patterns can result?

This is the concept of permutations, to get the number of different colour patterns obtained when 5 identical red wooden blocks and 6 identical wooded blocks stacked together, we calculate for their permutations which is:

6P5

=720

the answer is 720 patterns