PSLE
Stores C and D sell punchers of four colours. The bar graphs show the number of punchers sold by each shop in October. The bar for the number purple punchers sold by Store C has not been drawn.

1. Half of the punchers sold by Store C were purple punchers. How many purple punchers did Store C sell?
2. Which colour(s) of punchers did Store C sell less than Store D? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In November, Store D sold 10 more green punchers than the number of green punchers sold in October. What was the percentage increase in the number of green punchers sold by Store D from October to November?

(a)
Number of green punchers sold in Store C = 225
Number of orange punchers sold in Store C = 225
Number of pink punchers sold in Store C = 75

Since purple punchers sold in Store C is half of the punchers sold by Store C, the total of green punchers, orange punchers and pink punchers is equal to purple punchers.

Number of purple punchers sold in Store C
= 225 + 225 + 75
= 525

(b)
Number of green punchers sold in Store C = 225 (More)
Number of green punchers sold in Store D = 50

Number of orange punchers sold in Store C = 225 (Equal)
Number of orange punchers sold in Store D = 225

Number of pink punchers sold in Store C = 75 (Less) 
Number of pink punchers sold in Store D = 175

Number of purple punchers sold in Store C = 525 (More) 
Number of purple punchers sold in Store D = 75 

Colour(s) of punchers that Store C sold less than Store D = Pink (P)

(c)
Percentage increase in the number of green punchers sold by Store D from October to November
= ¹⁰₅₀ x 100%
= ¹₅ x 100%
= 20%

Answer(s): (a) 525; (b) P; (c) 20%