Adam has green and red stickers in the ratio of 9 : 5.
He has 60 more green stickers than red 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 red stickers?
(a)
Number of green stickers = 9 u
Number of red stickers = 5 u
Number of more green stickers than red stickers
= 9 u - 5 u
= 4 u
4 u = 60
1 u = 60 ÷ 4 = 15
Number of stickers that Adam has
= 9 u + 5 u
= 14 u
= 14 x 15
= 210
(b)
Number of green stickers after Adam gives away 10
= 9 u - 10
= 9 x 15 - 10
= 135 - 10
= 125
Number of red stickers
= 5 u
= 5 x 10
= 75
New ratio of the number of green stickers to red stickers
125 : 75
(÷ 25) 5 : 3
Answer(s): (a) 210; (b) 5 : 3