Question

What is the number of ways in which one can colour the squares of a 4 multiply 4 chessboard with colour red and blue such that each row as well as each column has exactly two red squares and two blue squares?

Answer 1

A chessboard comprises of 64 measure up to squares masterminded in eight lines and eight segments.

The squares are orchestrated in two substituting hues, white and dark.

Various materials are utilized to make chessboards, so the lighter shaded material is known as white and the darker material is known as dark.