A Math Student Is Interested in Counting the Number of Jelly

Short Answer

A math student is interested in counting the number of jelly beans in a jar. The student opens the jar
and removes 40 jelly beans. She places a distinctive mark on each bean and places it back in the jar.
After thoroughly shaking the jar, she reaches in and removes 65 jelly beans of which 10 are marked.
Using the techniques of capture-recapture, estimate the number of jelly beans in the jar. Give your answer rounded to the nearest whole number.