a.

Suppose I'm randomly ranking all of my students in my health economics

class from best to worst. If I have 50 students in my class, how many potential rankings

are possible? Write down the expression you would use to calculate this but do not

calculate the final number.

b.

Suppose I want to randomly assign my class of 50 students into 10 groups

with 5 students in each group. How many ways can I randomly assign my students into

these groups? Write down the expression you would use to calculate this but do not

calculate the final number.