Final answer:
The correct ratio for the sale of buying 2 oranges for $3 is 3:2. None of the given options accurately represent the correct ratio of the transaction, as they either show different proportions or suggest incorrect pricing structures.
Step-by-step explanation:
The student has asked what the ratio is for each sale when a local grocery store has a deal to buy 2 oranges for $3, and whether the given ratios are equivalent. To find the ratio for the sale, we divide the total cost by the number of items. In this case, each orange costs $1.50, so the ratio is $1.50 per orange. None of the provided ratios, a) 8:18, b) 8:18, c) 2/1, or d) 2/1, represent this deal accurately.
The ratios a) and b) are the same and not equivalent to the given sale because they represent a different proportion. The ratios c) and d) are also identical and express a 2:1 ratio, which is also incorrect for this sale because it suggests one item costs twice as much as the other, which is not the case here.
To calculate the ratio correctly, we would express the cost of one orange as $3/2. If we simplify that to a ratio with whole numbers, we can use the equivalent ratio of 3:2, which is not listed in the options provided.