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1 year ago

In a school of 1600 students, the ratio of teachers to students is 1:16.

Mathematics

1 answer:

a_sh-v [17]1 year ago

4 0

Answer:

The number of teacher who joined the school is 20

Step-by-step explanation:

Teacher : Students = 1 : 16

Number of teachers = 1x

Number of students = 16x

16x = 1600

x = 1600/16

x = 100

Number of teachers at the beginning = 100

Now, after some teachers (let it be y) joining the school,

Teacher : students = 3:40

$\frac{100+y}{1600}=\frac{3}{40}\\\\40*(100+y)=3*1600\\\\4000+40y = 4800\\\\40y=4800-4000\\\\40y=800\\\\y=\frac{800}{40}\\\\y=20$

The number of teacher who joined the school is 20

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1 year ago

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wolverine [178]

<u>ANSWER</u>

$9\: < x \leqslant0$

<u>EXPLANATION</u>

The given compound inequality is

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We add 6 through out the inequality.

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1 year ago