Question

In a chess competition involving some boys and girls of a school, every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls and in 190 games both were boys. The number of games in which one player was a boy and the other was a girl is

Answer 1

@ganeshie8

Answer 2

10 girls,20boys =200

Answer 3

how?

Answer 4

@SithsAndGiggles

Answer 5

Just to simplify the situation, suppose there are 3 boys and 4 girls. Considering one person at a time, you can count the total number of game like so: