PSLE Stores N and P sell rulers of four colours. The bar graphs show the number of rulers sold by each shop in April. The bar for the number blue rulers sold by Store N has not been drawn.
- Half of the rulers sold by Store N were blue rulers. How many blue rulers did Store N sell?
- Which colour(s) of rulers did Store N sell less than Store P? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
- In May, Store P sold 10 less orange rulers than the number of orange rulers sold in April. What was the percentage increase in the number of orange rulers sold by Store P from April to May?
(a)
Number of purple rulers sold in Store N = 100
Number of orange rulers sold in Store N = 120
Number of green rulers sold in Store N = 100
Since blue rulers sold in Store N is half of the rulers sold by Store N, the total of orange rulers, green rulers and purple rulers is equal to blue rulers.
Number of blue rulers sold in Store N
= 120 + 100 + 100
= 320
(b)
Number of purple rulers sold in Store N = 100 (Less)
Number of purple rulers sold in Store P = 140
Number of orange rulers sold in Store N = 120 (More)
Number of orange rulers sold in Store P = 40
Number of green rulers sold in Store N = 100 (Equal)
Number of green rulers sold in Store P = 100
Number of blue rulers sold in Store N = 320 (More)
Number of blue rulers sold in Store P = 80
Colour(s) of rulers that Store N sold less than Store P = Purple (P)
(c)
Percentage decrease in the number of orange rulers sold by Store P from April to May
=
1040 x 100%
=
14 x 100%
= 25%
Answer(s): (a) 320; (b) P; (c) 25%