In a school, 10% of number of girls is equal to (1/20)th

Home » Aptitude » Ratio, Proportion » Question

In a school, 10% of number of girls is equal to (1/20)th of number of boys. Ratio between the number of boys to number of girls is

1. 1 : 2
2. 2 : 1
3. 1 : 4
4. 4 : 1

Correct Option: B

If boys = x and girls = y, then

y ×	10	=	x	⇒	y	=	x
	100		20		10		20

⇒	x	=	20	=	2	= 2 : 1
	y		10		1