Problema Solution
Sally has 5 red flags, 3 green flags, and 2 white flags. How many 10-flag signals can she run up a flag pole?
She can create ____ signals.
Answer provided by our tutors
The question asked is about how one can rearrange 10 flags from 3 different groups with different number of elements in each group.
5 red flags cn be put at (10 5) places, 3 green falags - at (8 3) places, 2 white - at(2 2 ) places.
so (10 5)(8 3)(2 2)
where (m n) stands for m!/(n!(m-n)!)