A college campus is having a freshman ice cream social. There are 100
students who attend the event. Event A is that a student chose
chocolate ice cream. Event B is that a student chose sprinkles. 55
students had chocolate ice cream. 25 had both chocolate ice cream
and sprinkles. 70 students had sprinkles.

What is the probability that a student randomly selected would
have chosen sprinkles given that they chose chocolate ice
cream? Show your work.