in a school of 2000 students, the ratio of teachers to students is 3: 80.
some teachers join the school and the ratio changes to 1: 20.
find the number of teachers who joined the school.

The answer to your questions is: 25 new teachers

Step-by-step explanation:

Data

# of students = 2000

ratio = 3:80 teachers to students

New teachers = ?

Process

I suggest to use rule of three to solve this problem

                     3 teachers  80 students

                      x                  2000 students

                  x = (2000 x 3) / 80 = 75 teachers

               Number of initial teachers = 75

The ratio change to 1:20

                     1 teacher  20 students

                     x               2000 students

                     x = (2000 x 1) / 20

                    x = 100 teachers

Number of new teachers = 100 - 75 = 25

answer: the value of x is 7cm

step-by-step explanation:

1 1/5

step-by-step explanation: