Amy is doing a science experiment on how a certain bacterium reacts to an antibiotic. she has 3 dishes of identical bacterium samples with 11 bacteria in each dish. she gives an antibiotic to all of the bacteria in one dish. all of the treated bacteria died, and the bacteria in the other two dishes survived. identify the sample size in the situation above. a. 3 b. 11 c. 33 d. 22

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.