PSLE
School camp coats were available in 4 colours: grey, white, green and gold. At the camp, each kids chose one coat. The pie chart represents the kids' choice of coat colours. 36 kids chose gold coats. The kids' choice of coat colours is also represented by the bar graph. The bar that shows the number of kids who chose grey coats has not been drawn. How many kids chose grey coats?

    
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 = 60 

¹₄ of the pie chart = 60
⁴₄ of the pie chart = 4 x 60 = 240

Total number of kids = 240

Number of kids who chose grey coats
= 240 - 60 - 60 - 36
= 84

Answer(s): 84