估计NY的人口 10 million, 平均10人1俩车, so 1 million cars, plus outside temp cars, you can sample on street, if you see 100 cars, 80 with NY plate and 20 with other plates, then the percentage of the out car is about 0.25, so the total cars in NY is 1.25 million.
【在 h********w 的大作中提到】 : 估计NY的人口 10 million, : 平均10人1俩车, : so 1 million cars, : plus outside temp cars, : you can sample on street, if you see 100 cars, 80 with NY plate and 20 with : other plates, then the percentage of the out car is about 0.25, so the total : cars in NY is 1.25 million.