ACT Mathematics OG Test 2 - questions 41-60

Question 1 A certain hotel has 80 rooms. Based on many previous years occupancy rates, the owners of the hotel constructed the table below showing the daily occupancy rates and their probabilities of occurring for the coming summer season. Based on the probability distribution in the table, to the nearest whole number, what is the expected number of rooms that will be occupied on any day during the coming summer season?