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Mathematics, 29.09.2019 18:30 nicollexo21

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.

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in a school of 2000 students, the ratio of teachers to students is 3: 80.
some teachers join t...
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