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Printjmc
algebra junior
Problem
The ratio of teachers to students in a particular school is 1 to 11. The ratio of female students to the total number of students is 4 to 9. If there are 396 female students, how many teachers are there?
Solution
Since female students make up of the total student body, multiply 396 by to find how many students there are total. That yields 891 students total, and since there are 11 times as many students, divide 891 by 11 to obtain total.
Final answer
81\text{ teachers}