Question

Figure shows the sale of mobiles of different brands.

Which mobile brand's sale is 0.25 of the Nokia?

Answer 1

Sale of mobile phone is proportional to the area or central angle covered by it in pie-chart.

From the figure we see that only Redmi and Oppo mobiles have sales less than that of Nokia.

Therefore,
$\frac{SaleofRedmimobiles}{SaleofNokiamobiles}=\frac{{35}^{\circ }}{{60}^{\circ }}\approx 0.58\ne 0.25$

and,
$\frac{SaleofOppomobiles}{SaleofNokiamobiles}=\frac{{15}^{\circ }}{{60}^{\circ }}=0.25$

Hence, Oppo mobiles have sales equal to 0.25 of the sales of Nokia mobiles.