PSLE
School camp windbreakers were available in 4 colours: yellow, blue, green and red. At the camp, each contestants chose one windbreaker. The pie chart represents the contestants' choice of windbreaker colours. 44 contestants chose yellow windbreakers. The contestants' choice of windbreaker colours is also represented by the bar graph. The bar that shows the number of contestants who chose blue windbreakers has not been drawn. How many contestants chose blue windbreakers?

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

From the bar graph,
Number of contestants who chose green = Number of contestants who chose red = 44 

¹₄ of the pie chart = 44
⁴₄ of the pie chart = 4 x 44 = 176

Total number of contestants = 176

Number of contestants who chose blue windbreakers
= 176 - 44 - 44 - 44
= 44

Answer(s): 44