To find the grocery item with the lowest unit price, calculate the unit price for each option by dividing the total price by the quantity of the item. Option c, 15 oranges for $12, has the lowest unit price of $0.80 per orange.
In order to find the grocery item with the lowest unit price, we need to calculate the unit price for each option. The unit price is calculated by dividing the total price by the quantity of the item. Let's calculate the unit price for each option:
- Option a: 10 oranges for $10. Unit price = $10 / 10 = $1 per orange.
- Option b: 12 oranges for $20. Unit price = $20 / 12 ≈ $1.67 per orange.
- Option c: 15 oranges for $12. Unit price = $12 / 15 = $0.80 per orange.
- Option d: 20 oranges for $18. Unit price = $18 / 20 = $0.90 per orange.
Therefore, option c has the lowest unit price of $0.80 per orange, making it the grocery item with the lowest unit price.