2. on certain crossing, 20% passenger held round-trip ticket and took cars abroad the ship, if 60% of passengers with round-trip tickets didnot take their cars abroad the ship, what % of ship's passenger held round-trip ticket?作者: netbanker 时间: 2009-11-22 04:06 标题: for integer n, n* is defined by n*=n^2+1, what is the value of int k?
1. when k is divided by 4, remainder is 1 2. 18=k*=36作者: bqu002 时间: 2009-11-22 04:32
2. 有round trip ticket的人分2种,设带车的为A,没带车的为B。其中带车的占总人数的20%,A/TOTAL=20%, 还知道B/(A+B)=60%