Question

The ratio of girls to boys in a tennis club is 4:5. If there are 144 children in the club, how many are girls?

Answer 1

$\huge \bf \purple{answer}$

$\bf \red{given - total \: number \: of \: students = 144} \\ \bf \red{ - ratio \: of \: girls \: and \: boys = 4.5}$

$\bf \green {let \: number \: of \: boys \: be \: 5x \: } \\ \bf \green{then \:number \: of \: girls \: be \: \: 4x }$

$\bf \blue{therefore \: 5x + 4x = 144} \: \: \\ \\ \bf \: ie \: number \: of \: girls + boys = total \: students$

$\bf \pink{9x = 144} \\ \bf \orange{ x = 16} \\ \\ \bf \green{4 \times 16 = 64 \: girls} \\ \bf \green{5 \times 16 = 80boys}$