Adam has blue and green stickers in the ratio of 9 : 4.
He has 50 more blue stickers than green stickers.
- How many stickers does Adam have?
- If Adam gives away 40 blue stickers, what is the new ratio of the number of blue stickers to green stickers?
(a)
Number of blue stickers = 9 u
Number of green stickers = 4 u
Number of more blue stickers than green stickers
= 9 u - 4 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Number of stickers that Adam has
= 9 u + 4 u
= 13 u
= 13 x 10
= 130
(b)
Number of blue stickers after Adam gives away 40
= 9 u - 40
= 9 x 10 - 40
= 90 - 40
= 50
Number of green stickers
= 4 u
= 4 x 40
= 40
New ratio of the number of blue stickers to green stickers
50 : 40
(÷ 10) 5 : 4
Answer(s): (a) 130; (b) 5 : 4