Question 1152097
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I do not understand what is written in this post  --  so inaccurately it presents the problem.


But I solved a very similar problem under this link


<A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1152095.html>https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1152095.html</A>


https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1152095.html



Look in it: it may happen that this solution is what you want.


Or will allow you to built your own solution for the given problem.