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primary 6 | Maths
| Data Analysis
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Date Posted: 5 years ago
Views: 327
nos.
nb: 1u
p: 4u
e: 3u
cost
nb + p + e = 62.40
nb + 9.60 = p
e + 4.80 = nb
nb + nb + 9.60 + e = 62.40
nb + nb + 9.60 + e = 62.40
e + 4.80 + e + 4.80 + 9.60 + e = 62.40
e = 14.40
nb = 19.20
p = 28.80
unit cost
nb = e + 2.40
19.20/u = 14.40/3u + 2.40
19.20/u = 4.80/u + 2.40
u = 6
24 pencils bought
...
nb: 1u
p: 4u
e: 3u
cost
nb + p + e = 62.40
nb + 9.60 = p
e + 4.80 = nb
nb + nb + 9.60 + e = 62.40
nb + nb + 9.60 + e = 62.40
e + 4.80 + e + 4.80 + 9.60 + e = 62.40
e = 14.40
nb = 19.20
p = 28.80
unit cost
nb = e + 2.40
19.20/u = 14.40/3u + 2.40
19.20/u = 4.80/u + 2.40
u = 6
24 pencils bought
...
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