Respuesta :

Answer:

15 students are girls

Step-by-step explanation:

7+5=12

12x3=36

5x3=15

7x3=21

21+15=36

Since that ratio is 7 : 5 all you gotta do is add 7 +5 to get 12 the you divide 36 by 12 to get 3. Then since ur looking for the girls, u times 3 by 5 to get 15 girl students
So the answer should be 15
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