GMAT Data Sufficiency

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Source: PREP

Level: 5

What is the average (arithmetic mean) of eleven consecutive integers?

(1)The aver age of the first nine integers is 7.

(2)The average of the last nine integers is 9.

  • A Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  • B Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  • C BOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
  • D EACH statement ALONE is sufficient.
  • E Statements (1) and (2) TOGETHER are NOT sufficient.

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