 # Solutions

Get detailed explanations to advanced GMAT questions.

### Question

If the average (arithmetic mean) of the assessed values of x houses is \$212,000 and the average of the assessed values of y other houses is \$194,000, what is the average of the assessed values of the x+y houses?

I. x+y=36

II. x=2y

Option A:

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.

Option B:

Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.

Option C:

BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.

Option D:

EACH statement ALONE is sufficient to answer the question asked.

Option E:

Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

Hard

### Solution

Option B is the correct answer.

### Option Analysis

This is a simple weighted average question, and if we knew the ratio of x to y it would be sufficient to answer the question

Statement I is insufficient: x+y=36. Not sufficient.

Statement II is sufficient: x=2y. Hence we know the ratio. So Sufficient