组三组六的概率

简介：Zhu Cixiang held up his telescope and observed carefully, and suddenly felt a little uneasy in his heart, because he saw that among the infantry formations on both sides of the invasion force, the soldiers used large tarpaulins to hide something. The military formations of the two sides were two miles apart. Although he could see the tarpaulin, he had no way of knowing what was hidden under the tarpaulin.