There are 360 students in front of the school waiting for buses to transport them to a museum each bus can transport no more than 42 students what is the minimum number of buses needed to transport all of the students to the museum

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.