NETMAN数学JJ NO10的质疑

寂寞的自由

10There are five minorities in a nation, the total population is 50 millions, J,K,L,M,N(listed from the most to the least), the population in each minority might be equal, the N has 2 millions people, and L has 21 percent of the total population, what might be the most numbers of the population minority M?
(1)5
(2)6
(3)7
(4)8
(5)9
My answer: C
自由的答案：不同意，应该是第5个答案吧？

binneal

I am not sure about this one.  In my exam, it was 6 minorities, I, J, K, L, M, N (in descending order of popluations),  L is 21% and N is 2 million.  Again, there could be ties.

Asked the largest popluation possible for M and the answer was 50*(1-0.21*4) - 2 = 6

寂寞的自由

以下是引用binneal在2004-1-19 4:07:00的发言：
I am not sure about this one.  In my exam, it was 6 minorities, I, J, K, L, M, N (in descending order of popluations),  L is 21% and N is 2 million.  Again, there could be ties.

Asked the largest popluation possible for M and the answer was 50*(1-0.21*4) - 2 = 6

BINNEAL，自由没明白您的意思，这个黑体字部分什么意思啊？特别是4代表什么？