Tony wants to estimate the number of bees in a beehive.
He catches 100 bees from the hive and marks each one with a dye. He then lets the bees go.
The next day, Tony catches 60 bees from the hive. 15 of these bees have been marked with dye.
A) Using this information, what is a good estimate for the number of bees in a beehive ?
B) Write down any one assumption you have made.

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297