Adam has red and blue stickers in the ratio of 8 : 3.
He has 40 more red stickers than blue stickers.
- How many stickers does Adam have?
- If Adam gives away 20 red stickers, what is the new ratio of the number of red stickers to blue stickers?
(a)
Number of red stickers = 8 u
Number of blue stickers = 3 u
Number of more red stickers than blue stickers
= 8 u - 3 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Number of stickers that Adam has
= 8 u + 3 u
= 11 u
= 11 x 8
= 88
(b)
Number of red stickers after Adam gives away 20
= 8 u - 20
= 8 x 8 - 20
= 64 - 20
= 44
Number of blue stickers
= 3 u
= 3 x 20
= 24
New ratio of the number of red stickers to blue stickers
44 : 24
(÷ 4) 11 : 6
Answer(s): (a) 88; (b) 11 : 6