Xiaofang, Xiaoliang, Xiaohua, Xiaoming and Xiaoli are going to watch the game, but there are only two tickets. Please think about it, which two people will go to watch the game? How many possibilities are there?
小芳、小亮、小华、小明和小丽五人准备去看球赛，可球票只有2张，请你想一想，是哪两个人进去看球赛？一共有几种可能性？
<gadget id="calculator">4 + 3 + 2 + 1</gadget>
<output>10</output>

<result>10</result>