Adam has 120 red stickers, green stickers, blue stickers and yellow stickers.
5% of the stickers are red.
35% of the stickers are green.
The rest are blue and yellow stickers.
There are 10 more blue stickers than yellow stickers.
- How many yellow stickers are there?
- How many less red stickers than green stickers?
Red
|
Green
|
Blue
|
Yellow
|
Total
|
1 u
|
7 u |
12 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 35% =
35100 =
720 Number of blue and yellow stickers
= 20 u - 1 u - 7 u
= 12 u
20 u = 120
1 u = 120 ÷ 20 = 6
Number of blue and yellow stickers
= 12 u
= 12 x 6
= 72
12 u = 2 p + 10
2 p + 10 = 72
2 p = 72 - 10
2 p = 62
1 p = 62 ÷ 2 = 31
Number of yellow stickers
= 1 p
= 31
(b)
Number of less red stickers than green stickers
= 7 u - 1 u
= 6 u
= 6 x 6
= 36
Answer(s): (a) 31; (b) 36