Adam has 160 blue stickers, green stickers and red stickers.
30% of the stickers are green.
25% 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 |
3 u |
7 u |
|
25% |
75% |
|
7 u x 25% = 1.75 u
|
7 u x 75% = 5.25 u
|
30% =
30100 =
310 Total number of stickers = 10 u
Number of green stickers = 3 u
Number of blue and red stickers
= 10 u - 3 u
= 7 u
10 u = 160
1 u = 160 ÷ 10 = 16
(a)
Percent of remaining stickers that are red
= 100% - 25%
= 75%
Number of red stickers
= 75% x 7 u
= 0.75 x 7 u
= 5.25 u
= 5.25 x 16
= 84
(b)
Number of blue stickers
= 25% x 7 u
= 0.25 x 7 u
= 1.75 u
Number of green stickers = 3 u
Number of less blue stickers than green stickers
= 3 u - 1.75 u
= 1.25 u
= 1.25 x 16
= 20
Answer(s): (a) 84; (b) 20