PSLE
School camp vests were available in 4 colours: red, gold, pink and yellow. At the camp, each participants chose one vest. The pie chart represents the participants' choice of vest colours. 45 participants chose gold vests. The participants' choice of vest colours is also represented by the bar graph. The bar that shows the number of participants who chose pink vests has not been drawn. How many participants chose pink 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 = 50 

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

Total number of participants = 200

Number of participants who chose pink vests
= 200 - 50 - 50 - 45
= 55

Answer(s): 55