Question

Raffle tickets numbered 1 through 30 are placed in a box. Tickets for a second raffle numbered 21 to 48 are placed in another box. One ticket is randomly drawn from each box. What is the probability that both tickets will be greater than 20 or less than 30?

Answer 1

tickets numbered 1 - 30.......greater then 20, less then 30 = (21 - 29) = 9 tickets......9/30

tickets numbered 21 - 48...greater then 20 or less then 30 = (21 - 29) = 9 tickets.....9/28

9/30 * 9/28 = 81/840 = 27/280