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Question 2 is ambiguous. It says that fourteen of his coins are not nickels, but that does not necessarily imply that the other two <I>are</I> nickels (If he has 15 coins that are not nickels, it is a valid statement that he has 14 coins that are not nickels). So his coins could be {9,2,5}, {9,1,6} or {9,0,7} (the third option may not be possible, depending on how you interpret the first statement in the question, but either of the first two definitely fit the description). Also, be sure to report your answer as a dollars-and-cents amount, not as a list of coins, since that's what the question is asking for.
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Strewth
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