The American Red Cross Says That About 11% of the U.S

Essay

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.
-Surprised by the low number of Type B blood donors at the blood drive, the American Red Cross wonders if the 11% estimate was too high for your area.How many Type B blood donors would it take to convince you that this estimate might be too high? Justify your answer.