18/11/11 13:45:47.68 RT24eksu.net
Rだと
found_car = 5
max_number = 60
max_car = 100
n=max_number:max_car
pmf=choose(max_number-1,found_car-1)/choose(n,found_car) # Pr(max=60|n)
pdf=pmf/sum (pmf)
sum(n*pdf) #E(n)
で済むが 分数では算出できず
18/11/11 13:45:47.68 RT24eksu.net
Rだと
found_car = 5
max_number = 60
max_car = 100
n=max_number:max_car
pmf=choose(max_number-1,found_car-1)/choose(n,found_car) # Pr(max=60|n)
pdf=pmf/sum (pmf)
sum(n*pdf) #E(n)
で済むが 分数では算出できず