PSLE Stationery Shops D and E sell highlighters of four colours. The bar graphs show the number of highlighters sold by each shop in January. The bar for the number orange highlighters sold by Stationery Shop D has not been drawn.
- Half of the highlighters sold by Stationery Shop D were orange highlighters. How many orange highlighters did Stationery Shop D sell?
- Which colour(s) of highlighters did Stationery Shop D sell less than Stationery Shop E? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
- In February, Stationery Shop E sold 40 less purple highlighters than the number of purple highlighters sold in January. What was the percentage increase in the number of purple highlighters sold by Stationery Shop E from January to February?
(a)
Number of green highlighters sold in Stationery Shop D = 40
Number of purple highlighters sold in Stationery Shop D = 160
Number of blue highlighters sold in Stationery Shop D = 180
Since orange highlighters sold in Stationery Shop D is half of the highlighters sold by Stationery Shop D, the total of purple highlighters, blue highlighters and green highlighters is equal to orange highlighters.
Number of orange highlighters sold in Stationery Shop D
= 160 + 180 + 40
= 380
(b)
Number of green highlighters sold in Stationery Shop D = 40 (Less)
Number of green highlighters sold in Stationery Shop E = 120
Number of purple highlighters sold in Stationery Shop D = 160 (More)
Number of purple highlighters sold in Stationery Shop E = 80
Number of blue highlighters sold in Stationery Shop D = 180 (Equal)
Number of blue highlighters sold in Stationery Shop E = 180
Number of orange highlighters sold in Stationery Shop D = 380 (More)
Number of orange highlighters sold in Stationery Shop E = 140
Colour(s) of highlighters that Stationery Shop D sold less than Stationery Shop E = Green (G)
(c)
Percentage decrease in the number of purple highlighters sold by Stationery Shop E from January to February
=
4080 x 100%
=
12 x 100%
= 50%
Answer(s): (a) 380; (b) G; (c) 50%