10 people( consist of male and female ) seating in a table with 10 chairs, in how many ways we can choose 2 people out of 10 with condition that male and female are not seating next to each other....

10 people( consist of male and female ) seating in a table with 10 chairs, in how many ways we can choose 2 people out of 10 with condition that male and female are not seating next to each other. using addition rule find all the 2 people pair then substract from all the pair consist of male and female.