PSLE
School camp jackets were available in 4 colours: pink, white, green and grey. At the camp, each kids chose one jacket. The pie chart represents the kids' choice of jacket colours. 42 kids chose grey jackets. The kids' choice of jacket colours is also represented by the bar graph. The bar that shows the number of kids who chose pink jackets has not been drawn. How many kids chose pink jackets?

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

From the bar graph,
Number of kids who chose green = Number of kids who chose white = 42 

¹₄ of the pie chart = 42
⁴₄ of the pie chart = 4 x 42 = 168

Total number of kids = 168

Number of kids who chose pink jackets
= 168 - 42 - 42 - 42
= 42

Answer(s): 42