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Question
The student-teacher ratio in a school is 45 : 2. If there are 4050 students in the school, how many teachers must be there?
Solution
Total number of students = 4050
Let the total number of teachers = x
The student-teacher ratio in a school = 45 : 2
∴ Required ratio =`"Total number of students"/"Total number of teachers"`
⇒ `45/2=4050/"x"`
⇒ x =`(4050xx2)/45` = 180 teachers
∴ Number of teachers = 180
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