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

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

From the bar graph,
Number of students who chose silver = Number of students who chose gold = 45 

¹₄ of the pie chart = 45
⁴₄ of the pie chart = 4 x 45 = 180

Total number of students = 180

Number of students who chose pink shirts
= 180 - 45 - 45 - 41
= 49

Answer(s): 49