There are 390 students who are enrolled in an introductory engineering course. If there are eight boys to every seven girls , how many boys are in the course

Answer 1

If you keep increasing boys by 8 and girls by 7 and then add the number you will get to 390.

or

8n + 7n = 390 15n = 390 n = 26

so,

8(26) = 208 (Boys)

7(26) = 182 (Girls)

Sum = 390