Adam has 200 red stickers, yellow stickers, green stickers and blue stickers.
15% of the stickers are red.
35% of the stickers are yellow.
The rest are green and blue stickers.
There are 10 more green stickers than blue stickers.
- How many blue stickers are there?
- How many less red stickers than yellow stickers?
Red
|
Yellow
|
Green
|
Blue
|
Total
|
3 u
|
7 u |
10 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
15% =
15100 =
320 35% =
35100 =
720 Number of green and blue stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 200
1 u = 200 ÷ 20 = 10
Number of green and blue stickers
= 10 u
= 10 x 10
= 100
10 u = 2 p + 10
2 p + 10 = 100
2 p = 100 - 10
2 p = 90
1 p = 90 ÷ 2 = 45
Number of blue stickers
= 1 p
= 45
(b)
Number of less red stickers than yellow stickers
= 7 u - 3 u
= 4 u
= 4 x 10
= 40
Answer(s): (a) 45; (b) 40