PSLE
Four teams of students sold coke for charity.
They collected $3 for a small cup of coke and $7 for a big cup of coke.

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

	Small cups	Big cups
Team C	17	4
Team D	13	9
Team E	7	10

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 C?
3. Team F sold as many cups of coke as Team C but collected $20 more. How many big cups of coke did Team F sell?

(a)
Amount collected by Team C = 51 + 28
= $79

Amount collected by Team D
= 13 x 3 + 9 x 7
= 39 + 63
= $102

Amount collected by Team E
= 7 x 3 + 10 x 7
= 21 + 70
= $91

Team D collected the most money.

(b)
Amount collected by Team C = $79

(c)

	Small cups	Big cups	Total cups	Total amount
Team C	17	4	21	$79
Team F	12	9	21	79 + 20 = $99

Since Team F and Team C sold the same number of cups but Team C collected $20 more, it means that Team F sold more big cups than Team C.

Difference in the total amount collected between Team F and Team C = $20

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

Number of extra big cups sold by Team F
= 20 ÷ 4
= 5

Number of big cups sold by Team F
= 4 + 5
= 9

Answer(s): (a) D; (b) $79; (c) 9