PSLE
A fruit stall sold mangosteens at 60¢ and lemons at 30¢ each. Rachel bought some mangosteens and Mary bought some lemons from the stall. Rachel spent $0.30 more than Mary, but had 7 fruits fewer than Mary.

1. How many mangosteens did Rachel buy?
2. How much did Mary spend on the lemons?

	Mangosteens	Lemons
Number	1 u	1 u + 7
Value	0.6	0.3
Total value	0.6 u	0.3 u + 2.1

(a)
Number of mangosteens that Rachel bought = 1 u
Number of lemons that Mary bought = 1 u + 7

Amount that Rachel paid = 0.6 x 1 u = 0.6 u
Amount that Mary paid = 0.3(1 u + 7) = 0.3 u + 2.1

If Mary spent another $0.30, both Mary and Rachel would spend the same amount.

0.6 u = 0.3 u + 2.1 + 0.3
0.6 u - 0.3 u = 2.1 + 0.3
0.3 u = 2.4

1 u = 2.4 ÷ 0.3 = 8

Number of mangosteens that Rachel bought
= 1 u
= 8

(b)
Amount that Mary spent on the lemons
= 0.3 u + 2.1
= 0.3 x 8 + 2.1
= 2.4 + 2.1
= $4.50

Answer(s): (a) 8; (b) $4.50