If 70% of the students in a school are boys and the number of girls is 504, what is the number of boys in the school?

A. 1176
B. 504
C. 876
D. 1276

Explanation: The total number of students in the school can be found by solving the equation 504 / (1 – 0.7) = 1680. The number of boys in the school can then be found by multiplying the total number of students by 0.7, which is 1176 students.

### The number of boys can be calculated as follows:

Let’s assume that the total number of students in the school is X.
So, 70% of the total students are boys, which is 0.7X.
And, the number of girls is 504.
So, the total number of students can be found as X = 504 + 0.7X
Solving this equation, we get X = 504 / (1 – 0.7) = 504 / 0.3 = 1680
And, the number of boys can be found as 0.7X = 0.7 * 1680 = 1176 students.