Free GMAT Test Questions

Question 1 of 1
ID: GMAT-DS-4
Section: Quantitative Reasoning - Data Sufficiency
Topics: Statistics; Standard Deviation
Difficulty level: Challenging

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What is the standard deviation of 1, 2, 3, $k$, 5, 6 and 7?

  1. Standard deviation of 2, 3, 4, $(k+1)$, 6, 7 and 8 is 2.
  2. Standard deviation of 0, 1, 2, $(k-1)$, 4, 5, and 6 is 2.
AStatement (1) ALONE is sufficient, but statement (2) ALONE is not sufficient to answer the question asked.
BStatement (2) ALONE is sufficient, but statement (1) ALONE is not sufficient to answer the question asked.
CBOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.
DEACH statement ALONE is sufficient to answer the question asked.
EStatements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

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