PSLE
A fruit stall sold guavas at 90¢ and mangosteens at 60¢ each. Min bought some guavas and Anna bought some mangosteens from the stall. Anna spent $2.10 less than Min, but had 2 fruits more than Min.

1. How many mangosteens did Anna buy?
2. How much did Min spend on the guavas?

	Guavas	Mangosteens
Number	1 u	1 u + 2
Value	0.9	0.6
Total value	0.9 u	0.6 u + 1.2

(a)
Number of guavas that Min bought = 1 u
Number of mangosteens that Anna bought = 1 u + 2

Amount that Min paid = 0.9 x 1 u = 0.9 u
Amount that Anna paid = 0.6(1 u + 2) = 0.6 u + 1.2

If Anna spent another $2.10, both Anna and Min would spend the same amount.

0.9 u = 0.6 u + 1.2 + 2.1
0.9 u - 0.6 u = 1.2 + 2.1
0.3 u = 3.3

1 u = 3.3 ÷ 0.3 = 11

Number of mangosteens that Anna bought
= 1 u + 2
= 11 + 2
= 13

(b)
Amount that Min spent on the guavas
= 0.9 u 
= 0.9 x 11 
= $9.90

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