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Sugar is sold in four different sized packets - HSC - SSCE Mathematics Standard - Question 2 - 2019 - Paper 1
Question 2
Sugar is sold in four different sized packets. Which is the best buy? A. 100 g for $0.40 B. 500 g for $1.65 C. 1 kg for $3.50 D. 2 kg for $6.90
Worked Solution & Example Answer:Sugar is sold in four different sized packets - HSC - SSCE Mathematics Standard - Question 2 - 2019 - Paper 1
Step 1
Calculate the price per gram for each option
Answer
To determine the best buy, we calculate the price per gram for each packet:
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Option A:
- 100 g for $0.40
- Price per gram = ( \frac{0.40}{100} = 0.004 ) or 0.4 cents/g
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Option B:
- 500 g for $1.65
- Price per gram = ( \frac{1.65}{500} = 0.0033 ) or 0.33 cents/g
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Option C:
- 1 kg (1000 g) for $3.50
- Price per gram = ( \frac{3.50}{1000} = 0.0035 ) or 0.35 cents/g
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Option D:
- 2 kg (2000 g) for $6.90
- Price per gram = ( \frac{6.90}{2000} = 0.00345 ) or 0.345 cents/g
Step 2