PSLE
Stationery Kiosks X and Y sell punchers of four colours. The bar graphs show the number of punchers sold by each shop in April. The bar for the number pink punchers sold by Stationery Kiosk X has not been drawn.

1. Half of the punchers sold by Stationery Kiosk X were pink punchers. How many pink punchers did Stationery Kiosk X sell?
2. Which colour(s) of punchers did Stationery Kiosk X sell less than Stationery Kiosk Y? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In May, Stationery Kiosk Y sold 15 less orange punchers than the number of orange punchers sold in April. What was the percentage increase in the number of orange punchers sold by Stationery Kiosk Y from April to May?

(a)
Number of yellow punchers sold in Stationery Kiosk X = 100
Number of orange punchers sold in Stationery Kiosk X = 175
Number of purple punchers sold in Stationery Kiosk X = 200

Since pink punchers sold in Stationery Kiosk X is half of the punchers sold by Stationery Kiosk X, the total of orange punchers, purple punchers and yellow punchers is equal to pink punchers.

Number of pink punchers sold in Stationery Kiosk X
= 175 + 200 + 100
= 475

(b)
Number of yellow punchers sold in Stationery Kiosk X = 100 (Less) 
Number of yellow punchers sold in Stationery Kiosk Y = 225

Number of orange punchers sold in Stationery Kiosk X = 175 (More)
Number of orange punchers sold in Stationery Kiosk Y = 75

Number of purple punchers sold in Stationery Kiosk X = 200 (Equal)
Number of purple punchers sold in Stationery Kiosk Y = 200

Number of pink punchers sold in Stationery Kiosk X = 475 (More) 
Number of pink punchers sold in Stationery Kiosk Y = 200 

Colour(s) of punchers that Stationery Kiosk X sold less than Stationery Kiosk Y = Yellow (Y)

(c)
Percentage decrease in the number of orange punchers sold by Stationery Kiosk Y from April to May
= ¹⁵₇₅ x 100%
= ¹₅ x 100%
= 20%

Answer(s): (a) 475; (b) Y; (c) 20%