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7th Grade Challenging Math

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7-53)   Answer

           150

 

Solution: The ratio of chickens versus the total number of animals is 1/(4+1) = 1/5.
The ratio of turkeys versus the total number of animals is 2/(13+2) = 2/15.
The ratio of rabbits versus the total number of animals is 4/(11+4) = 4/15.

The ratio of the sum of chickens, turkeys and rabbits versus the total number of animals is 1/5 + 2/15 + 4/15 = 9/15.
Therefore, the ratio of pigs versus the total number of animals = 6/15 i.e. 2/5.
Therefore, the total number of animals is 60 * (5/2) = 150 animals

 
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