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

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

From the bar graph,
Number of participants who chose white = Number of participants who chose red = 45 

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

Total number of participants = 180

Number of participants who chose gold jackets
= 180 - 45 - 45 - 36
= 54

Answer(s): 54