Respuesta :

Answer:

There are 27 boys in the classroom

Step-by-step explanation:

Step-by-step explanation:

40% = 4/10 = 2/5;

45÷5=9, 9×2=18; There are 18 girls in the classroom.

45-18=27; 27+18=45; There are 27 boys in the classroom.

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