Supposed you drop two cards from a standard 52 card deck look at them and then put them back and shuffle you repeat this 15 times how many times do you expect to drop two cards of the same rank

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.