PSLE
A fruit stall sold peaches at 60¢ and oranges at 30¢ each. Min bought some peaches and Betty bought some oranges from the stall. Betty spent $0.90 less than Min, but had 9 fruits more than Min.

1. How many oranges did Betty buy?
2. How much did Min spend on the peaches?

	Peaches	Oranges
Number	1 u	1 u + 9
Value	0.6	0.3
Total value	0.6 u	0.3 u + 2.7

(a)
Number of peaches that Min bought = 1 u
Number of oranges that Betty bought = 1 u + 9

Amount that Min paid = 0.6 x 1 u = 0.6 u
Amount that Betty paid = 0.3(1 u + 9) = 0.3 u + 2.7

If Betty spent another $0.90, both Betty and Min would spend the same amount.

0.6 u = 0.3 u + 2.7 + 0.9
0.6 u - 0.3 u = 2.7 + 0.9
0.3 u = 3.6

1 u = 3.6 ÷ 0.3 = 12

Number of oranges that Betty bought
= 1 u + 9
= 12 + 9
= 21

(b)
Amount that Min spent on the peaches
= 0.6 u 
= 0.6 x 12 
= $7.20

Answer(s): (a) 12; (b) $7.20