PSLE
The bar graphs show the sale of child tickets and adult tickets to a zoo over four days. The scale of the graph for adult tickets is not shown.

1. How many child tickets were sold in total on Monday and Wednesday?
2. The ratio of the number of adult tickets sold on Wednesday to the total number of tickets sold on that day was 4 : 5. How many adult tickets were sold on Tuesday?

 
(a)
Number of child tickets sold on Monday = 20
Number of child tickets sold on Tuesday = 40
Number of child tickets sold on Wednesday = 90
Number of child tickets sold on Thursday = 100

Total number of child tickets sold on Monday and Wednesday
= 20 + 90
= 110

(b)
Total number of tickets sold on Wednesday = 5 u
Number of adult tickets sold on Wednesday = 4 u

Number of child tickets sold on Wednesday
= 5 u - 4 u
= 1 u

1 u = 90

Number of adult tickets sold on Wednesday
= 4 u
= 4 x 90
= 360

2 p = 360

1 p = 360 ÷ 2 = 180

Number of adult tickets sold on Tuesday
= 4 p
= 4 x 180
= 720

Answer(s): (a) 110; (b) 720