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

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

 
(a)
Number of adult tickets sold on Monday = 30
Number of adult tickets sold on Tuesday = 50
Number of adult tickets sold on Wednesday = 60
Number of adult tickets sold on Thursday = 80

Total number of adult tickets sold on Tuesday and Thursday
= 50 + 80
= 130

(b)
Total number of tickets sold on Monday = 5 u
Number of child tickets sold on Monday = 4 u

Number of adult tickets sold on Monday
= 5 u - 4 u
= 1 u

1 u = 30

Number of child tickets sold on Monday
= 4 u
= 4 x 30
= 120

4 p = 120

1 p = 120 ÷ 4 = 30

Number of child tickets sold on Thursday
= 2 p
= 2 x 30
= 60

Answer(s): (a) 130; (b) 60