送交者: vince 于 2006-5-26, 10:00:24:
回答: cctv 由 xys 于 2006-5-26, 09:47:37:
If one has his/her hair cut every month, then we need about 210000/(12*16) = 1093孤寡老人. If one does it every two months, then the number will be about 2200. The article seems to indicate there are only about 280 of them. So these people have their hair cut 3.9 times a month, almost every week! That's a bit too much, even it's a free service! And women have their hair cut much less than men... lol