PSLE
A fruit stall sold pomegranates at 70¢ and grapefruits at 40¢ each. Jane bought some pomegranates and Risa bought some grapefruits from the stall. Risa spent $0.70 less than Jane, but had 2 fruits more than Jane.

1. How many grapefruits did Risa buy?
2. How much did Jane spend on the pomegranates?

	Pomegranates	Grapefruits
Number	1 u	1 u + 2
Value	0.7	0.4
Total value	0.7 u	0.4 u + 0.8

(a)
Number of pomegranates that Jane bought = 1 u
Number of grapefruits that Risa bought = 1 u + 2

Amount that Jane paid = 0.7 x 1 u = 0.7 u
Amount that Risa paid = 0.4(1 u + 2) = 0.4 u + 0.8

If Risa spent another $0.70, both Risa and Jane would spend the same amount.

0.7 u = 0.4 u + 0.8 + 0.7
0.7 u - 0.4 u = 0.8 + 0.7
0.3 u = 1.5

1 u = 1.5 ÷ 0.3 = 5

Number of grapefruits that Risa bought
= 1 u + 2
= 5 + 2
= 7

(b)
Amount that Jane spent on the pomegranates
= 0.7 u 
= 0.7 x 5 
= $3.50

Answer(s): (a) 5; (b) $3.50