PSLE
A fruit stall sold lemons at 90¢ and plums at 70¢ each. Cindy bought some lemons and Irene bought some plums from the stall. Irene spent $0.80 less than Cindy, but had 2 fruits more than Cindy.

1. How many plums did Irene buy?
2. How much did Cindy spend on the lemons?

	Lemons	Plums
Number	1 u	1 u + 2
Value	0.9	0.7
Total value	0.9 u	0.7 u + 1.4

(a)
Number of lemons that Cindy bought = 1 u
Number of plums that Irene bought = 1 u + 2

Amount that Cindy paid = 0.9 x 1 u = 0.9 u
Amount that Irene paid = 0.7(1 u + 2) = 0.7 u + 1.4

If Irene spent another $0.80, both Irene and Cindy would spend the same amount.

0.9 u = 0.7 u + 1.4 + 0.8
0.9 u - 0.7 u = 1.4 + 0.8
0.2 u = 2.2

1 u = 2.2 ÷ 0.2 = 11

Number of plums that Irene bought
= 1 u + 2
= 11 + 2
= 13

(b)
Amount that Cindy spent on the lemons
= 0.9 u 
= 0.9 x 11 
= $9.90

Answer(s): (a) 11; (b) $9.90