PSLE
Four teams of students sold lemonade for charity.
They collected $4 for a small cup of lemonade and $7 for a big cup of lemonade.

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

	Small cups	Big cups
Team G	15	4
Team H	13	9
Team J	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 J?
3. Team H sold as many cups of lemonade as Team K but collected $9 less. How many small cups of lemonade did Team K sell?

(a)
Amount collected by Team G = 60 + 28
= $88

Amount collected by Team H
= 13 x 4 + 9 x 7
= 52 + 63
= $115

Amount collected by Team J
= 7 x 4 + 10 x 7
= 28 + 70
= $98

Team G collected the least money.

(b)
Amount collected by Team J = $98

(c)

	Small cups	Big cups	Total cups	Total amount
Team H	13	9	22	$115
Team K	10	12	22	115 + 9 = $124

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

Difference in the total amount collected between Team H and Team K = $9

Difference in the amount collected for every one extra big cup sold by Team K
= 7 - 4
= $3

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

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

Answer(s): (a) G; (b) $98; (c) 10