Changing an Apples-to-Oranges Ratio

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The present ratio of apples to oranges within a basket is 10 to 1. If 18 apples and 3 oranges were added, the ratio of apples to oranges would be 7 to 1. How many apples are in the basket?

Review: Changing an Apples-to-Oranges Ratio


Explanation

In this question, the numbers in both the question and the answer choices are pretty friendly, so it's a good candidate for the old "plug in the answer choices and see which one works" method. For example, we can try (B). Actually, that would give us a fractional number of oranges, which won't work. So (B) and (D) are out. Let's try (C):





The ratio is close to 7 to 1, but it's a bit too wide.





This gives the correct 7-to-1 ratio.

The correct answer is (A).


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