PSLE
School camp sweaters were available in 4 colours: pink, brown, yellow and white. At the camp, each pupils chose one sweater. The pie chart represents the pupils' choice of sweater colours. 35 pupils chose pink sweaters. The pupils' choice of sweater colours is also represented by the bar graph. The bar that shows the number of pupils who chose brown sweaters has not been drawn. How many pupils chose brown sweaters?

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

From the bar graph,
Number of pupils who chose yellow = Number of pupils who chose white = 50 

¹₄ of the pie chart = 50
⁴₄ of the pie chart = 4 x 50 = 200

Total number of pupils = 200

Number of pupils who chose brown sweaters
= 200 - 50 - 50 - 35
= 65

Answer(s): 65