Whole Numbers (Pri6)/ Whole Numbers Punggol View Primary School / Homework (2018) $A\mathrm{mango}\mathrm{cost}\$2.50\mathrm{and}\mathrm{an}\mathrm{apple}\mathrm{cost}\$0.75.\phantom{\rule{0ex}{0ex}}\mathrm{Shirely}\mathrm{paid}\$48\mathrm{for}\mathrm{some}\mathrm{apples}\mathrm{and}\mathrm{mangoes}.\phantom{\rule{0ex}{0ex}}1/3\mathrm{of}\mathrm{the}\mathrm{friuts}\mathrm{she}\mathrm{bought}\mathrm{were}\mathrm{mangoes}.\phantom{\rule{0ex}{0ex}}\mathrm{How}\mathrm{many}\mathrm{mangoes}\mathrm{did}\mathrm{she}\mathrm{buy}\mathrm{altogether}?\phantom{\rule{0ex}{0ex}}$

$\mathrm{Total}\mathrm{fruits}=n\phantom{\rule{0ex}{0ex}}(\frac{1}{3}n\times 2.50)+(\frac{2}{3}n\times 0.75)=48\phantom{\rule{0ex}{0ex}}\frac{4}{3}n=48\phantom{\rule{0ex}{0ex}}n=36\phantom{\rule{0ex}{0ex}}\mathrm{So}\mathrm{mangoes}=\frac{1}{3}\times 36=12\left(\mathrm{ans}\right)$ 


