PSLE
School camp skirts were available in 4 colours: green, brown, purple and silver. At the camp, each participants chose one skirt. The pie chart represents the participants' choice of skirt colours. 41 participants chose brown skirts. The participants' choice of skirt colours is also represented by the bar graph. The bar that shows the number of participants who chose purple skirts has not been drawn. How many participants chose purple skirts?

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

From the bar graph,
Number of participants who chose green = Number of participants who chose silver = 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 purple skirts
= 180 - 45 - 45 - 41
= 49

Answer(s): 49