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**Quote:**

If ninety percent of the expected number of managers attended a conference, how many managers attended the conference?

(1) No more than ninety percent of all managers were expected to attend the conference

(2) 7 managers did not attend the conference

Source: Master Gmat 18 Q in sample test

From statement 1

Let total no. of managers be x.

a maximum of 0.9x managers were expected to attend.

at max, 0.9(0.9x) managers attended.

Insufficient

From statement 2

We do not know the number of managers expected to attend. Unable to derive any concrete values with given info.

Insufficient.

Statement 1 + 2

We are not sure how many percent of total managers attended the conference. It can be anywhere between 0% to 90%.

As such, knowing the number of managers who did not attend is insufficient for us to derive answer.

Insufficient.

Answer: E

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