Adam has 290 green stickers, red stickers, blue stickers and yellow stickers.
15% of the stickers are green.
35% of the stickers are red.
The rest are blue and yellow stickers.
There are 10 more blue stickers than yellow stickers.
- How many yellow stickers are there?
- How many more red stickers than green stickers?
Green
|
Red
|
Blue
|
Yellow
|
Total
|
3 u |
7 u |
10 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
15% =
15100 =
320 35% =
35100 =
720 Number of blue and yellow stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 290
1 u = 290 ÷ 20 = 14.5
Number of blue and yellow stickers
= 10 u
= 10 x 14.5
= 145
10 u = 2 p + 10
2 p + 10 = 145
2 p = 145 - 10
2 p = 135
1 p = 135 ÷ 2 = 67.5
Number of yellow stickers
= 1 p
= 67.5
(b)
Number of more red stickers than green stickers
= 7 u - 3 u
= 4 u
= 4 x 14.5
= 58
Answer(s): (a) 67.5; (b) 58