PSLE Stationery Shops P and Q sell highlighters of four colours. The bar graphs show the number of highlighters sold by each shop in October. The bar for the number green highlighters sold by Stationery Shop P has not been drawn.
- Half of the highlighters sold by Stationery Shop P were green highlighters. How many green highlighters did Stationery Shop P sell?
- Which colour(s) of highlighters did Stationery Shop P sell less than Stationery Shop Q? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
- In November, Stationery Shop Q sold 25 less orange highlighters than the number of orange highlighters sold in October. What was the percentage increase in the number of orange highlighters sold by Stationery Shop Q from October to November?
(a)
Number of purple highlighters sold in Stationery Shop P = 80
Number of orange highlighters sold in Stationery Shop P = 180
Number of yellow highlighters sold in Stationery Shop P = 80
Since green highlighters sold in Stationery Shop P is half of the highlighters sold by Stationery Shop P, the total of orange highlighters, yellow highlighters and purple highlighters is equal to green highlighters.
Number of green highlighters sold in Stationery Shop P
= 180 + 80 + 80
= 340
(b)
Number of purple highlighters sold in Stationery Shop P = 80 (Less)
Number of purple highlighters sold in Stationery Shop Q = 160
Number of orange highlighters sold in Stationery Shop P = 180 (More)
Number of orange highlighters sold in Stationery Shop Q = 100
Number of yellow highlighters sold in Stationery Shop P = 80 (Equal)
Number of yellow highlighters sold in Stationery Shop Q = 80
Number of green highlighters sold in Stationery Shop P = 340 (More)
Number of green highlighters sold in Stationery Shop Q = 200
Colour(s) of highlighters that Stationery Shop P sold less than Stationery Shop Q = Purple (P)
(c)
Percentage decrease in the number of orange highlighters sold by Stationery Shop Q from October to November
=
25100 x 100%
=
14 x 100%
= 25%
Answer(s): (a) 340; (b) P; (c) 25%