1. A farmer had 500 heads of cabbage. He sold 45% of them on Monday and 20% of the remainder on Tuesday.
a. What percentage of the heads of cabbage is he left with after Tuesday?
b. How many heads of cabbage did he have left after Tuesday?

2. 60% of the students in a school travel to school by bus. 30% of the remainder walk to school. The rest travel to school by car. If there are 2300 students in the school, find the number of students who travel to school by car.

3. 60 children went to the zoon for an art competition. 1/4 of them drew elephants, 20% of the remaining children drew giraffes and the rest drew lions. How many children drew lions?