PSLE Book Shops E and F sell files of four colours. The bar graphs show the number of files sold by each shop in July. The bar for the number green files sold by Book Shop E has not been drawn.
- Half of the files sold by Book Shop E were green files. How many green files did Book Shop E sell?
- Which colour(s) of files did Book Shop E sell less than Book Shop F? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
- In August, Book Shop F sold 15 less yellow files than the number of yellow files sold in July. What was the percentage increase in the number of yellow files sold by Book Shop F from July to August?
(a)
Number of purple files sold in Book Shop E = 25
Number of yellow files sold in Book Shop E = 225
Number of pink files sold in Book Shop E = 225
Since green files sold in Book Shop E is half of the files sold by Book Shop E, the total of yellow files, pink files and purple files is equal to green files.
Number of green files sold in Book Shop E
= 225 + 225 + 25
= 475
(b)
Number of purple files sold in Book Shop E = 25 (Less)
Number of purple files sold in Book Shop F = 250
Number of yellow files sold in Book Shop E = 225 (More)
Number of yellow files sold in Book Shop F = 100
Number of pink files sold in Book Shop E = 225 (Equal)
Number of pink files sold in Book Shop F = 225
Number of green files sold in Book Shop E = 475 (More)
Number of green files sold in Book Shop F = 100
Colour(s) of files that Book Shop E sold less than Book Shop F = Purple (P)
(c)
Percentage decrease in the number of yellow files sold by Book Shop F from July to August
=
15100 x 100%
=
320 x 100%
= 15%
Answer(s): (a) 475; (b) P; (c) 15%