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

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

From the bar graph,
Number of students who chose red = Number of students who chose blue = 60 

¹₄ of the pie chart = 60
⁴₄ of the pie chart = 4 x 60 = 240

Total number of students = 240

Number of students who chose brown skirts
= 240 - 60 - 60 - 32
= 88

Answer(s): 88