I cant figure out how to solve part b of this problem Can yo

I can\'t figure out how to solve part (b) of this problem. Can you help me?

Solution

well for part b we need part a)

a)

you have 40 numbers and you need to select 5 numbers in any order that means that the order doesnt matter

so we need to use a combinacion

40 C 5 = 658,008

b)

we need the probability that you will win the prize

for thise we need to know how many ways can I win... there is only 1 way to win

select the 5 numbers correctly

so

P = 1 / 658008 = 0.000001519