PSLE Bookstores K and L sell folders of four colours. The bar graphs show the number of folders sold by each shop in June. The bar for the number orange folders sold by Bookstore K has not been drawn.
- Half of the folders sold by Bookstore K were orange folders. How many orange folders did Bookstore K sell?
- Which colour(s) of folders did Bookstore K sell less than Bookstore L? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
- In July, Bookstore L sold 50 more green folders than the number of green folders sold in June. What was the percentage increase in the number of green folders sold by Bookstore L from June to July?
(a)
Number of green folders sold in Bookstore K = 200
Number of blue folders sold in Bookstore K = 125
Number of purple folders sold in Bookstore K = 50
Since orange folders sold in Bookstore K is half of the folders sold by Bookstore K, the total of green folders, blue folders and purple folders is equal to orange folders.
Number of orange folders sold in Bookstore K
= 200 + 125 + 50
= 375
(b)
Number of green folders sold in Bookstore K = 200 (More)
Number of green folders sold in Bookstore L = 100
Number of blue folders sold in Bookstore K = 125 (Equal)
Number of blue folders sold in Bookstore L = 125
Number of purple folders sold in Bookstore K = 50 (Less)
Number of purple folders sold in Bookstore L = 200
Number of orange folders sold in Bookstore K = 375 (More)
Number of orange folders sold in Bookstore L = 175
Colour(s) of folders that Bookstore K sold less than Bookstore L = Purple (P)
(c)
Percentage increase in the number of green folders sold by Bookstore L from June to July
=
50100 x 100%
=
12 x 100%
= 50%
Answer(s): (a) 375; (b) P; (c) 50%