Jamie’s drawer is pretty big. It has infinitely many crayons. In
fact, for every colour of crayon, there are infinitely many crayons of
that colour.
In every group of \(9\) randomly chosen
crayons from Jamie’s drawer, some \(3\)
will have the same colour. Jamie chooses \(25\) crayons at random. Prove that some
\(7\) of them will have the same
colour.