[Little Fishy]

this is such a common problem

for 23: 1-(364.25/365.25)(363.25/365.25)(362.25/365.25)*...((365.25-22)/365.25)

for 30 it's the same idea... there are a lot of differnt ways to do this problem but i think this is the most straight foreward and easiest to calcualte for some1 without a background in probability