likewhoa Senior | Next Rank: 100 Posts View User Profile Posts: 49 Joined: Sun Aug 12, 2007 8:17 pm Help~ by likewhoa » Tue Nov 20, 2007 12:47 am If X,Y and K are positive numbers such that 10X/(X+Y)+20Y/(X+Y)=K and if X<Y, which of the following could be the value of K? answer:18 Thanks in advance! Top Quote
