Number 9
2 marks · NormalA supermarket sells 800 g of rice for $3.20 and 1.25 kg of rice for $4.75. Calculate which pack gives the better value for money. Give your answer as the better-value pack.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
1.25 kg pack
Also accept: 1.25kg pack; 1.25 kg; the 1.25 kg pack; the 1.25kg pack
Common mistakes: Choosing the lower total price, not lower unit price.
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Calculate the unit price (cost per kg or per 100 g) for both packs.
A1 · 1 mark · Correctly state the better-value pack with correct supporting calculation. (follow-through)
Worked solution
Cost per kg for 800 g pack: $3.20 ÷ 0.8 = $4.00 per kg.
Cost per kg for 1.25 kg pack: $4.75 ÷ 1.25 = $3.80 per kg.
The 1.25 kg pack is better value.