Adam has 400 blue stickers, green stickers and red stickers.
40% of the stickers are green.
30% of the remaining stickers are blue.
The rest are red stickers.
- How many red stickers are there?
- How many less blue stickers than green stickers?
Green |
Blue |
Red |
2 u |
3 u |
|
30% |
70% |
|
3 u x 30% = 0.9 u
|
3 u x 70% = 2.1 u
|
40% =
40100 =
25 Total number of stickers = 5 u
Number of green stickers = 2 u
Number of blue and red stickers
= 5 u - 2 u
= 3 u
5 u = 400
1 u = 400 ÷ 5 = 80
(a)
Percent of remaining stickers that are red
= 100% - 30%
= 70%
Number of red stickers
= 70% x 3 u
= 0.7 x 3 u
= 2.1 u
= 2.1 x 80
= 168
(b)
Number of blue stickers
= 30% x 3 u
= 0.3 x 3 u
= 0.9 u
Number of green stickers = 2 u
Number of less blue stickers than green stickers
= 2 u - 0.9 u
= 1.1 u
= 1.1 x 80
= 88
Answer(s): (a) 168; (b) 88