Adam has 300 yellow stickers, red stickers, green stickers and blue stickers.
15% of the stickers are yellow.
35% of the stickers are red.
The rest are green and blue stickers.
There are 10 more green stickers than blue stickers.
- How many blue stickers are there?
- How many more red stickers than yellow stickers?
Yellow
|
Red
|
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 = 300
1 u = 300 ÷ 20 = 15
Number of green and blue stickers
= 10 u
= 10 x 15
= 150
10 u = 2 p + 10
2 p + 10 = 150
2 p = 150 - 10
2 p = 140
1 p = 140 ÷ 2 = 70
Number of blue stickers
= 1 p
= 70
(b)
Number of more red stickers than yellow stickers
= 7 u - 3 u
= 4 u
= 4 x 15
= 60
Answer(s): (a) 70; (b) 60