Question

In a class of 42 students the number of boys is 2/5 of the girls . find the number of boys and girls

Answer 1

in plain and short, we simply divide 42 by (2+5) and distribute accordingly.


`\bf \cfrac{boys}{girls}\qquad 2:5\qquad \cfrac{2\cdot (42)/(2+5)}{5\cdot (42)/(2+5)}\implies \cfrac{2\cdot 6}{5\cdot 6}\implies \cfrac{12}{30}`