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April 21, 2015

April 21, 2015

Posted by **alya** on Thursday, October 13, 2011 at 10:23am.

- PROBLEM SOLVING IN MATHEMATICS -
**drwls**, Thursday, October 13, 2011 at 10:41amLet x be the number of students and y be the number of teachers. You want to know y/x.

The sum of the products of people and there ages can be written as

(x + y)*20 or 15 x + 35 y.

Therefore

(x + y)*20 = 15 x + 35 y

5x = 15 y.

y/x = 1/3 is the teacher/student ratio.

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