Answer:
36 boys.
Step-by-step explanation:
The ratio of boys to the total is
3/11. Where did that 11 come from? You add the two components of the ratio to get the ratio of one of the genders to the total.
boys / total = 3 /(8 + 3) = 3/11
3/11 = x / 132 Cross multiply
3 * 132 = 11x Divide by 11
3 * 132/11 = 11x/11 Simplify\
3 * 12 = x
x = 36
