389.--THE FOOTBALL PLAYERS.

"It is a glorious game!" an enthusiast was heard to exclaim. "At the

close of last season, of the footballers of my acquaintance four had

broken their left arm, five had broken their right arm, two had the

right arm sound, and three had sound left arms." Can you discover from

that statement what is the smallest number of players that the speaker

could be acquainted with?

It does not at all follow that there were as many as fourteen men,

because, for example, two of the men who had broken the left arm might

also be the two who had sound right arms.

Amusements in Mathematics · 第 453 / 970 题