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Of 1,000 dogs, 72% are male. Among the males, 3 out of 5 were over the age 5. How many of the dogs were males over the age of 5?

A 432

First multiply $8173_w141_h15.png$ to find out how many dogs are male. This results in 720 male dogs of which 3/5 are over the age of 5. Therefore $8551_w113_h37.png$