CALCULATOR
10. For a class picnic, two teachers went to the same store to purchase drinks. One teacher purchased 18 juice
boxes and 32 bottles of water, and spent $19.92. The other teacher purchased 6 juice boxes and 20 bottles
of water, and spent $8.88.

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.