PSLE
A fruit stall sold dragon fruits at 80¢ and lemons at 60¢ each. Emily bought some dragon fruits and Marion bought some lemons from the stall. Marion spent $0.20 less than Emily, but had 2 fruits more than Emily.

1. How many lemons did Marion buy?
2. How much did Emily spend on the dragon fruits?

	Dragon Fruits	Lemons
Number	1 u	1 u + 2
Value	0.8	0.6
Total value	0.8 u	0.6 u + 1.2

(a)
Number of dragon fruits that Emily bought = 1 u
Number of lemons that Marion bought = 1 u + 2

Amount that Emily paid = 0.8 x 1 u = 0.8 u
Amount that Marion paid = 0.6(1 u + 2) = 0.6 u + 1.2

If Marion spent another $0.20, both Marion and Emily would spend the same amount.

0.8 u = 0.6 u + 1.2 + 0.2
0.8 u - 0.6 u = 1.2 + 0.2
0.2 u = 1.4

1 u = 1.4 ÷ 0.2 = 7

Number of lemons that Marion bought
= 1 u + 2
= 7 + 2
= 9

(b)
Amount that Emily spent on the dragon fruits
= 0.8 u 
= 0.8 x 7 
= $5.60

Answer(s): (a) 7; (b) $5.60