PSLE
Shops V and W sell files of four colours. The bar graphs show the number of files sold by each shop in March. The bar for the number pink files sold by Shop V has not been drawn.

1. Half of the files sold by Shop V were pink files. How many pink files did Shop V sell?
2. Which colour(s) of files did Shop V sell less than Shop W? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In April, Shop W sold 20 more green files than the number of green files sold in March. What was the percentage increase in the number of green files sold by Shop W from March to April?

(a)
Number of green files sold in Shop V = 100
Number of purple files sold in Shop V = 90
Number of orange files sold in Shop V = 10

Since pink files sold in Shop V is half of the files sold by Shop V, the total of green files, purple files and orange files is equal to pink files.

Number of pink files sold in Shop V
= 100 + 90 + 10
= 200

(b)
Number of green files sold in Shop V = 100 (More)
Number of green files sold in Shop W = 40

Number of purple files sold in Shop V = 90 (Equal)
Number of purple files sold in Shop W = 90

Number of orange files sold in Shop V = 10 (Less) 
Number of orange files sold in Shop W = 80

Number of pink files sold in Shop V = 200 (More) 
Number of pink files sold in Shop W = 80 

Colour(s) of files that Shop V sold less than Shop W = Orange (O)

(c)
Percentage increase in the number of green files sold by Shop W from March to April
= ²⁰₄₀ x 100%
= ¹₂ x 100%
= 50%

Answer(s): (a) 200; (b) O; (c) 50%