A landscaper mows 25 lawns per day on sunny days, 15 lawns per day on cloudy days, and no lawns if it rains. If the weather is sunny 65% of the time, cloudy 30% of the time and rains 5% of the time, find the expected number of lawns that the landscaper mows per day. O23 lawns 17 lawns 19 lawns 21 lawns