In a school of 2400 students, the ratio of teachers to students is 1: 12. some teachers join the school and the ratio changes to 5: 48. find the number of teachers who joined the school.

50 teachers

Step-by-step explanation:

step 1

Find the number of teachers for a ratio of 1:12

1/12=x/2,400

x=2,400/12=200 teachers

step 2

Find the number of teachers for a ratio of 5:48

5/48=x/2,400

x=2,400*5/48=250 teachers

step 3

Find the difference

250-200=50 teachers

option: d is correct

step-by-step explanation: