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Mathematics, 15.03.2020 22:07 MrRandomUser

In a school of 2100 students, the ratio of teachers to students is 1:14.
Some teachers join the school and the ratio changes to 2:21.
Find the number of teachers who joined the school.

Can you say it quickly please

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In a school of 2100 students, the ratio of teachers to students is 1:14.
Some teachers join th...

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