PSLE
Four teams of students sold lemonade for charity.
They collected $5 for a small cup of lemonade and $8 for a big cup of lemonade.

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

	Small cups	Big cups
Team A	15	4
Team B	13	9
Team C	7	10

1. Which of the three teams collected the least money? Give your answer in letter. (Eg A)
2. What was the amount of money collected by Team C?
3. Team B sold as many cups of lemonade as Team D but collected $9 less. How many small cups of lemonade did Team D sell?

(a)
Amount collected by Team A = 75 + 32
= $107

Amount collected by Team B
= 13 x 5 + 9 x 8
= 65 + 72
= $137

Amount collected by Team C
= 7 x 5 + 10 x 8
= 35 + 80
= $115

Team A collected the least money.

(b)
Amount collected by Team C = $115

(c)

	Small cups	Big cups	Total cups	Total amount
Team B	13	9	22	$137
Team D	10	12	22	137 + 9 = $146

Since Team B and Team D sold the same number of cups but Team B collected $9 less, it means that Team D sold more big cups than Team B.

Difference in the total amount collected between Team B and Team D = $9

Difference in the amount collected for every one extra big cup sold by Team D
= 8 - 5
= $3

Number of extra big cups sold by Team D
= 9 ÷ 3
= 3

Number of small cups sold by Team D
= 13 - 3
= 10

Answer(s): (a) A; (b) $115; (c) 10