A researcher wishes to count the squirrel population in a large park.

She first captures and tags 30 squirrels, then releases them.

She later returns and captures 10 squirrels. 4 of them are tagged.

 

a.) Determine the population of squirrels in the park.

b.) Given your population, calculate the probability of finding 4 tagged squirrels in a sample of 10.

c.) Determine the probability of finding less than 4 tagged squirrels in a sample of 10.