Adam has 120 red stickers, blue stickers, green stickers and yellow stickers.
15% of the stickers are red.
35% of the stickers are blue.
The rest are green and yellow stickers.
There are 10 more green stickers than yellow stickers.
- How many yellow stickers are there?
- How many less red stickers than blue stickers?
Red
|
Blue
|
Green
|
Yellow
|
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 yellow stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 120
1 u = 120 ÷ 20 = 6
Number of green and yellow stickers
= 10 u
= 10 x 6
= 60
10 u = 2 p + 10
2 p + 10 = 60
2 p = 60 - 10
2 p = 50
1 p = 50 ÷ 2 = 25
Number of yellow stickers
= 1 p
= 25
(b)
Number of less red stickers than blue stickers
= 7 u - 3 u
= 4 u
= 4 x 6
= 24
Answer(s): (a) 25; (b) 24