PSLE
School camp shirts were available in 4 colours: brown, gold, silver and blue. At the camp, each participants chose one shirt. The pie chart represents the participants' choice of shirt colours. 32 participants chose gold shirts. The participants' choice of shirt colours is also represented by the bar graph. The bar that shows the number of participants who chose silver shirts has not been drawn. How many participants chose silver shirts?

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

From the bar graph,
Number of participants who chose brown = Number of participants who chose blue = 40 

¹₄ of the pie chart = 40
⁴₄ of the pie chart = 4 x 40 = 160

Total number of participants = 160

Number of participants who chose silver shirts
= 160 - 40 - 40 - 32
= 48

Answer(s): 48