PSLE
School camp skirts were available in 4 colours: purple, black, pink and silver. At the camp, each kids chose one skirt. The pie chart represents the kids' choice of skirt colours. 35 kids chose silver skirts. The kids' choice of skirt colours is also represented by the bar graph. The bar that shows the number of kids who chose purple skirts has not been drawn. How many kids chose purple skirts?

    
From the pie graph,
fraction of kids who chose pink or black
= ^90°_360°
= ¹₄

From the bar graph,
Number of kids who chose pink = Number of kids who chose black = 45 

¹₄ of the pie chart = 45
⁴₄ of the pie chart = 4 x 45 = 180

Total number of kids = 180

Number of kids who chose purple skirts
= 180 - 45 - 45 - 35
= 55

Answer(s): 55