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Q.

The student-teacher ratio in a school is 45:2. If there are 4050 students in the school how many teachers must be there?


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a

120

b

160

c

180

d

130 

answer is C.

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Detailed Solution

Concept- Assume first that there are teachers in the school. The total number of teachers in the school is then calculated using the ratio formula, which is the product of the total number of pupils and the total number of teachers in the school.
There are 4050 students enrolled in total.
In the school, the student-teacher ratio is 45:2.
Assume that there are x total teachers at the institution.
Hence,
Required ratio is equal to the Total number of students divided by the Total number of teachers
We get
Question ImageQuestion ImageQuestion ImageQuestion ImageQuestion Image teachers
Hence, the correct answer is option 3) 180
 
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