In a class there are $20$ girls and $30$ boys, then
Girls : Boys $=$ _______ $[2 : 3 / 3 : 2]$

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Solution

Given that,
Number of boys in the class $= 30$
Number of girls in the class $= 20$
Ratio of number of girls to number of boys $= 20 : 30$
Lowest form of $20 : 30 = \frac{20}{30} = \frac{2}{3} = 2 : 3$ ( Divide both $20$ and $30$ by their HCF $10$ )
Hence, Girls : Boys $= 2 : 3$

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