PSLE
A fruit stall sold grapefruits at 70¢ and apples at 40¢ each. Marion bought some grapefruits and Shiyun bought some apples from the stall. Shiyun spent $1.90 less than Marion, but had 2 fruits more than Marion.

1. How many apples did Shiyun buy?
2. How much did Marion spend on the grapefruits?

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

(a)
Number of grapefruits that Marion bought = 1 u
Number of apples that Shiyun bought = 1 u + 2

Amount that Marion paid = 0.7 x 1 u = 0.7 u
Amount that Shiyun paid = 0.4(1 u + 2) = 0.4 u + 0.8

If Shiyun spent another $1.90, both Shiyun and Marion would spend the same amount.

0.7 u = 0.4 u + 0.8 + 1.9
0.7 u - 0.4 u = 0.8 + 1.9
0.3 u = 2.7

1 u = 2.7 ÷ 0.3 = 9

Number of apples that Shiyun bought
= 1 u + 2
= 9 + 2
= 11

(b)
Amount that Marion spent on the grapefruits
= 0.7 u 
= 0.7 x 9 
= $6.30

Answer(s): (a) 9; (b) $6.30