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Tania knows that the ratio of boys to girls in her class is 3:5. Since 20 of the students are girls, she says that there must be 30 students in her class. Is she right? Explain your thinking.

Respuesta :

09pqr4sT

Answer:

No, there are 32 students in her class.

Step-by-step explanation:

The ratio to boys and girls is

[tex]3:5[/tex]

There are 20 girls in the classroom.

[tex]20/5=4[/tex]

[tex]3 \times 4= 12[/tex]

[tex]5 \times 4 =20[/tex]

[tex]12:20[/tex]

[tex]12+20=32[/tex]

gilbertazavedo72

Answer: 32 students in the classroom

Step-by-step explanation:

Let the no. of students be x, so

3/8x + 20 = x

3/8x - x = -20

-5/8x = -20

Multiply both sides by -8/5,

x = 32

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