choose(10,7)
factorial(10)/factorial(7)/factorial(10-7)
factorial(10)/(factorial(7)*factorial(10-7))
factorial(10)
factorial(100)
factorial(100)/factorial(98)
factorial(100)
factorial(98)
9.332622e+157/9.42689e+153
savehistory("N:/321_su19_data/20190522_in_class.Rhistory")