Question

X1, x2, x3,.... Xn me N prechado ka manak vichlan
..

Answer 1

Consider x

1

=1

Then we get x

2

+x

3

=50

x

2

=1,3,5,7...25

And

x

3

=49,47...25

Hence, total number of ways is 13.

The x

2

and x

1

can be interchanged.

Hence, total 25 ways.

Similarly we put x

1

=3 we get 24 ways and so on.

Hence the required permutation will be

=

2

26×25

=325.