There are 1200 students at a school. Each student has either a packed lunch or a school dinner.

62% of the students have school dinners.

55% of the students are girls.

45% of the girls have packed lunches.

How many boys have school dinners?

You must show all your working.

The number of boys that have school dinners is 381.  

Step-by-step explanation:

First, we need to find how many students have school dinners:

The percent of girls that have school dinners:

Now, we need to find the number of boys (b) and girls (g) at a school:

Hence. the percent of boys that have school dinners is given by:

Finally, the number of boys that have school dinners is:

Therefore, the number of boys that have school dinners is 381.                                

I hope it helps you!