Irrelevant Information

Sometimes, irrelevant information is provided in a problem to mislead you. Especially in the real world, not all presented pieces of data would ultimately affect your decision. If you are able to correctly identify the relevant and irrelevant information when choosing a solution strategy, you are one step closer to solving the problem.

Danny drove to the grocery store and bought several bags of chips. In order to determine the amount of money that he spent at the store, which of the following information do we NOT need?

(A)$\ \$ Number of bags of chips that Danny bought
(B)$\ \$ Make and model of the car that Danny drove
(C)$\ \$ Cost of 1 bag of chips
(D)$\ \$ All of the above
(E)$\ \$ None of the above

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In order to compute the total amount Danny spent in the store, we need to know how many bags of chips he bought, and how much one bag of chips costs. So, we can eliminate choices (A), (B), (D), and (E).

The make and model of the car don't affect the amount Danny spent at the store. So, we don't need this information.