Solution:
Let us analyze the given problem and find out our clues, which are the given.
Given:
ratio of 8:7
total of 45 students
no. of boys = ?
Next, let us transform "8" and "7" into "8x" and "7x", to make them add with each other which makes it equal to the total number of students.
8x + 7x = 45
Add.
15x = 45
Divide both sides by 15 and do the process of cancellation.
15x/15 = 45/15
x = 3
Now, let us substitute this with 8x as the ratio of boys to girls is 8:7
8x
8(3)
24
In conclusion, there are 24 boys in the classroom if there are a total of 45 students and the ratio of boys to girls is 8:7.
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