PSLE
A fruit stall sold mandarin oranges at 60¢ and guavas at 30¢ each. Esther bought some mandarin oranges and Erika bought some guavas from the stall. Esther spent $0.90 more than Erika, but had 3 fruits fewer than Erika.

1. How many mandarin oranges did Esther buy?
2. How much did Erika spend on the guavas?

	Mandarin Oranges	Guavas
Number	1 u	1 u + 3
Value	0.6	0.3
Total value	0.6 u	0.3 u + 0.9

(a)
Number of mandarin oranges that Esther bought = 1 u
Number of guavas that Erika bought = 1 u + 3

Amount that Esther paid = 0.6 x 1 u = 0.6 u
Amount that Erika paid = 0.3(1 u + 3) = 0.3 u + 0.9

If Erika spent another $0.90, both Erika and Esther would spend the same amount.

0.6 u = 0.3 u + 0.9 + 0.9
0.6 u - 0.3 u = 0.9 + 0.9
0.3 u = 1.8

1 u = 1.8 ÷ 0.3 = 6

Number of mandarin oranges that Esther bought
= 1 u
= 6

(b)
Amount that Erika spent on the guavas
= 0.3 u + 0.9
= 0.3 x 6 + 0.9
= 1.8 + 0.9
= $2.70

Answer(s): (a) 6; (b) $2.70