Question

In the Small State Lottery, three white balls are drawn (at random) from twenty balls numbered 1 through 20, and a blue Super Ball is drawn (at random) from ten balls numbered 21 through 30. When you buy a ticket, you select three numbers from 1-20 and one number from 21-30. To win the jackpot, the numbers on your ticket must match the three white balls and the Super Ball. (You don't need to match the white balls in order). If you buy a ticket, what is your probability of winning the jackpot?

Answer 1

P = $(\frac{3}{20} * \frac{2}{19} * \frac{1}{18} )* \frac{1}{10}$ = 

$p = \frac{1}{11400}$

The above converted to a decimal number:

p = 0.0000877193