Level 2 PSLE
School camp T-shirts were available in 4 colours: black, blue, red and white. At the camp, each child chose one T-shirt. The pie chart represents the children's choice of T-shirt colours. 40 children chose black T-shirts. The children's choice of T-shirt colours is also represented by the bar graph. The bar that shows the number of children who chose blue T-shirts has not been drawn. How many children choseblueT-shirts?