我用google翻譯了半天還是搞不懂意思
An elevator starts at the basement with 8 people (not including the elevator operator)
and discharges them all by the time it reaches the top floor, number 6. In how many
ways could the operator have perceived the people leaving the elevator if all people
look alike to him? What if the 8 people consisted of 5 men and 3 women and the
operator could tell a man from a women?
Suppose that 10 fish are caught at a lake that contains 5 distinct types of fish. How
many different outcomes are possible, where an outcome specifies the numbers of
caught fish of each of the 5 types?
更新1:
謝謝兩位哦~ 在請問一下 What if the 8 people consisted of 5 men and 3 women and the operator could "tell a man from a women" "tell a man from a women是甚麼意思? tell不是告訴的意思嗎?
更新2:
再請問一下哦~ 是已知湖中有5種魚,還是補獲了5種魚 因為如果是補獲了5種魚,那每條魚至少有1隻