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Question
primary 6 | Maths
| Data Analysis
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20c : 180
5c : 4u
total: 180 + 4u
%
20c : 20%
5c : 80%
total: 100%
used (%)
20c : none
5c : 75% of all 5c only = 75% of 80%
= 0.75 x 0.80 = 60%
total: 60%
4u = 80%
5u = 100%
180 + 4u = 5u
1u = 180
OR
180 = 20%
180 x 4 = 20x4 = 80%
720 = 80%
720 = 4u
1u = 180
nos. of 5c used = 60% of total
= 60% of 180 + 4u
= 0.60 x (180 + 720)
= 0.60 x 900
= 540
total value used = 5c x 540
= 2700c or $27
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