Question

Rectangle of side lenghts (2n-1)and (2m-1) units is divided into squares of unit length find no of rectangle which can be formed with side of odd length

Answer 1

Step-by-step explanation:

Let's select 1 vertical side out of 2m:2mC1. Now another vertical side can be out of m sides only coz length of rectangle should be odd.. Same goes with horizontal sides. So the answer would be( 2mC1*mC1/2)*(2nC1*nC1/2).