Posted by WAN on .
the entrance fee to the zoo is $3,and to get into the gardens is $2.A ticket to get into both is $4. One day 900 people were at the zoo and 700 in the garden.If 500 people visited only the zoo,what was the total amount of money collected that day

math 
PsyDAG,
Is 900 the total that visited? If so, then if 700 in the garden, then 700500 is the number that visited both and 900700 is the number that visited only the zoo.
700(2) + 200(3) + 200(4) = ?