PSLE
School camp vests were available in 4 colours: gold, blue, yellow and pink. At the camp, each kids chose one vest. The pie chart represents the kids' choice of vest colours. 43 kids chose gold vests. The kids' choice of vest colours is also represented by the bar graph. The bar that shows the number of kids who chose blue vests has not been drawn. How many kids chose blue vests?

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

From the bar graph,
Number of kids who chose yellow = Number of kids who chose pink = 43 

¹₄ of the pie chart = 43
⁴₄ of the pie chart = 4 x 43 = 172

Total number of kids = 172

Number of kids who chose blue vests
= 172 - 43 - 43 - 43
= 43

Answer(s): 43