<PRE><B>Question 892142</B>
let&#39;s see if i understand you correctly.


the company has 9000 potential patients.


for every 10 paying patients, you will give 5 free test.


what is the total number of paying patients?


if you mean that, for every 10 paying patients, you will take 5 free patients, then i would calculate the number of paying patients as follows:


the ratio of paying patients to total patients is 10/15 = 2/3


you have 9000 potential patients.


2/3 of them will be paying patients, so you will have 2/3 * 9000 = 6000 potential paying patients.












</PRE>