the ratio of number of boys and girls in a school is 2 : 5 . if there are 490 students in the school , find the number of girls in the school ?
"let the number of boys and girls be 2 x and 5 x total students = 490 number of girls in the school = 5 * 490 / 7 = 350 answer is b"
multiply(divide(490, const_3), const_2.0)