How to find mode - ISEE Upper Level: Quantitative Reasoning

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Question

Consider the data set

,

where is unknown.

Which is the greater quantity?

(a) The mode of the data set

(b) 5

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Answer

5 appears in the data set at least three times. Regardless of the value of , no other element (except 5) can appear more than twice. 5 must be the mode.

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