Welcome to John's CASA (Computerized Assessment of Skills for Algebra)
  Basic Ratios  
Four Eagles Ratios express the relative quantities of two different sets. For example, a biologist might be interested in the ratio of predators to prey.

First, count the number of animals in each set. 		Twelve Mice
How many Eagles are in the picture on the left?
 X = 		Count How many Mice are in the picture on the right?
Y =



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