PSLE
School camp sweaters were available in 4 colours: pink, black, gold and blue. At the camp, each students chose one sweater. The pie chart represents the students' choice of sweater colours. 38 students chose blue sweaters. The students' choice of sweater colours is also represented by the bar graph. The bar that shows the number of students who chose pink sweaters has not been drawn. How many students chose pink sweaters?

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

From the bar graph,
Number of students who chose gold = Number of students who chose black = 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 pink sweaters
= 240 - 60 - 60 - 38
= 82

Answer(s): 82