Adam has green and blue stickers in the ratio of 7 : 5.
He has 60 more green stickers than blue stickers.
- How many stickers does Adam have?
- If Adam gives away 10 green stickers, what is the new ratio of the number of green stickers to blue stickers?
(a)
Number of green stickers = 7 u
Number of blue stickers = 5 u
Number of more green stickers than blue stickers
= 7 u - 5 u
= 2 u
2 u = 60
1 u = 60 ÷ 2 = 30
Number of stickers that Adam has
= 7 u + 5 u
= 12 u
= 12 x 30
= 360
(b)
Number of green stickers after Adam gives away 10
= 7 u - 10
= 7 x 30 - 10
= 210 - 10
= 200
Number of blue stickers
= 5 u
= 5 x 10
= 150
New ratio of the number of green stickers to blue stickers
200 : 150
(÷ 50) 4 : 3
Answer(s): (a) 360; (b) 4 : 3