1.

There are 10 white and 10 black balls marked 1,2,3,...,10. The number of ways in which we can arrange these balls in a row in such a way that neighbouring balls are of different colour, is

Answer»

There are 10 white and 10 black balls marked 1,2,3,...,10. The number of ways in which we can arrange these balls in a row in such a way that neighbouring balls are of different colour, is



Discussion

No Comment Found