Adam has blue and green stickers in the ratio of 5 : 3.
He has 20 more blue stickers than green stickers.
- How many stickers does Adam have?
- If Adam gives away 10 blue stickers, what is the new ratio of the number of blue stickers to green stickers?
(a)
Number of blue stickers = 5 u
Number of green stickers = 3 u
Number of more blue stickers than green stickers
= 5 u - 3 u
= 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has
= 5 u + 3 u
= 8 u
= 8 x 10
= 80
(b)
Number of blue stickers after Adam gives away 10
= 5 u - 10
= 5 x 10 - 10
= 50 - 10
= 40
Number of green stickers
= 3 u
= 3 x 10
= 30
New ratio of the number of blue stickers to green stickers
40 : 30
(÷ 10) 4 : 3
Answer(s): (a) 80; (b) 4 : 3