PSLE
School camp vests were available in 4 colours: purple, yellow, red and brown. At the camp, each participants chose one vest. The pie chart represents the participants' choice of vest colours. 44 participants chose brown vests. The participants' choice of vest colours is also represented by the bar graph. The bar that shows the number of participants who chose purple vests has not been drawn. How many participants chose purple vests?

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

From the bar graph,
Number of participants who chose red = Number of participants who chose yellow = 44 

¹₄ of the pie chart = 44
⁴₄ of the pie chart = 4 x 44 = 176

Total number of participants = 176

Number of participants who chose purple vests
= 176 - 44 - 44 - 44
= 44

Answer(s): 44