Adam has 200 blue stickers, green stickers, red stickers and yellow stickers.
5% of the stickers are blue.
15% of the stickers are green.
The rest are red and yellow stickers.
There are 10 more red stickers than yellow stickers.
- How many yellow stickers are there?
- How many more green stickers than blue stickers?
Blue
|
Green
|
Red
|
Yellow
|
Total
|
1 u |
3 u |
16 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 15% =
15100 =
320 Number of red and yellow stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 200
1 u = 200 ÷ 20 = 10
Number of red and yellow stickers
= 16 u
= 16 x 10
= 160
16 u = 2 p + 10
2 p + 10 = 160
2 p = 160 - 10
2 p = 150
1 p = 150 ÷ 2 = 75
Number of yellow stickers
= 1 p
= 75
(b)
Number of more green stickers than blue stickers
= 3 u - 1 u
= 2 u
= 2 x 10
= 20
Answer(s): (a) 75; (b) 20