# MathForces Store

Author: mathforces
Problem has been solved: 32 times

Русский язык | English Language

The MathForces store sells 50 blue, 50 red, and 30 green pens. Lin randomly bought 65 pens and it turned out that he bought 5 blue pens less than red ones. Let the irreducible fraction $\frac{n}{m}$ be the probability that the next (randomly) purchased pen will turn out to be red. What is $n^2m^2$?