In a certain state's lottery, 40 balls numbered 1 through 40
are placed in a machine and seven of them are drawn at
random. If the seven numbers drawn match the numbers that
a player had chosen, the player wins $1,000,000. In this
lottery, the order the numbers are drawn in does not matter.
Compute the probability that you win the million-dollar prize
if you purchase a single lottery ticket. Write your answer as a
reduced fraction.
P(win) =