SOLUTION: In the cafeteria, the ratio of the number of girls to boys is 6:7. When 117 girls enter the cafeteria, the new ratio of girls to boys became 7:6. How many pupils were in the cafe
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Question 559533: In the cafeteria, the ratio of the number of girls to boys is 6:7. When 117 girls enter the cafeteria, the new ratio of girls to boys became 7:6. How many pupils were in the cafeteria at first?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the original ratio of girls to boys
given:
(1)
(2)
---------------------
(1)
(1)
and
(2)
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
There were
pupils in the cafe at first
check answer:
(2)
(2)
(2)
(2)
(2)
OK
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