Adam has 250 red stickers, yellow stickers, blue stickers and green stickers.
5% of the stickers are red.
15% of the stickers are yellow.
The rest are blue and green stickers.
There are 10 more blue stickers than green stickers.
- How many green stickers are there?
- How many more yellow stickers than red stickers?
Red
|
Yellow
|
Blue
|
Green
|
Total
|
1 u |
3 u |
16 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 15% =
15100 =
320 Number of blue and green stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 250
1 u = 250 ÷ 20 = 12.5
Number of blue and green stickers
= 16 u
= 16 x 12.5
= 200
16 u = 2 p + 10
2 p + 10 = 200
2 p = 200 - 10
2 p = 190
1 p = 190 ÷ 2 = 95
Number of green stickers
= 1 p
= 95
(b)
Number of more yellow stickers than red stickers
= 3 u - 1 u
= 2 u
= 2 x 12.5
= 25
Answer(s): (a) 95; (b) 25