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primary 6 | Maths
| Ratio
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Date Posted: 5 years ago
Views: 584
before,
f. bks: 3/5 u
nf. bks: u
1 3/5 u = 240
u = 150
so 150 non-fiction bks &
90 fiction bks at first.
after,
f. bks: 90-u
nf. bks: 150-u
total: 240-2u
90-u : 150-u = 5 : 9
9(90-u) = 5(150-u)
u = 15
30 books sold.
f. bks: 3/5 u
nf. bks: u
1 3/5 u = 240
u = 150
so 150 non-fiction bks &
90 fiction bks at first.
after,
f. bks: 90-u
nf. bks: 150-u
total: 240-2u
90-u : 150-u = 5 : 9
9(90-u) = 5(150-u)
u = 15
30 books sold.
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Date Posted:
5 years ago
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