CET Permutation and Combination Questions with Solutions – Page 5

Three Englishmen and three Frenchmen work for the same company Each of them knows a secret not known to others. They need to exchange these secrets over person-to-person phone calls so that eventually each person knows all six secrets. None of the Frenchmen knows English, and only one Englishman knows French. What is the minimum number of phone calls needed for the above purpose?

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