PSLE
Four teams of students sold hot chocolate for charity.
They collected $6 for a small cup of hot chocolate and $9 for a big cup of hot chocolate.

The table shows the number of cups sold by three of the teams.

	Small cups	Big cups
Team R	15	3
Team S	11	9
Team T	7	11

1. Which of the three teams collected the most money? Give your answer in letter. (Eg A)
2. What was the amount of money collected by Team R?
3. Team U sold as many cups of hot chocolate as Team R but collected $21 more. How many big cups of hot chocolate did Team U sell?

(a)
Amount collected by Team R = 90 + 27
= $117

Amount collected by Team S
= 11 x 6 + 9 x 9
= 66 + 81
= $147

Amount collected by Team T
= 7 x 6 + 11 x 9
= 42 + 99
= $141

Team S collected the most money.

(b)
Amount collected by Team R = $117

(c)

	Small cups	Big cups	Total cups	Total amount
Team R	15	3	18	$117
Team U	8	10	18	117 + 21 = $138

Since Team U and Team R sold the same number of cups but Team R collected $21 more, it means that Team U sold more big cups than Team R.

Difference in the total amount collected between Team U and Team R = $21

Difference in the amount collected for every one extra big cup sold by Team U
= 9 - 6
= $3

Number of extra big cups sold by Team U
= 21 ÷ 3
= 7

Number of big cups sold by Team U
= 3 + 7
= 10

Answer(s): (a) S; (b) $117; (c) 10