A cookie jar contains only two types of cookies—macaroons and ginger snaps. The ratio of macaroons to ginger snaps is 2 to 5. Which of the following could be the total number of cookies in the cookie jar?
If the ratio of the parts is 2 : 5, then the ratio total = 2 + 5 = 7. Thus the total number of cookies must be a multiple of 7. The only answer choice that's a multiple of 7 is Choice (1), 42 cookies.
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