Hi All,

This question can solved in a variety of ways: algebraically, by TESTing THE ANSWERS or with some basic arithmetic and logic. Here's how you can use that last option to avoid a lot of math and still get to the correct answer:

We're told that a mixture is made up of 3 elements:

1) 1/3 of the mixture is sand

2) 3/5 of the mixture is water

3) The remaining 12 pounds of the mixture is gravel.

We're asked for the total weight of the mixture in pounds.

1/3 = .33333

3/5 = .6

So the first two ingredients account for .933333 of the total weight. That's ALMOST ALL of the weight. The final 12 pounds represents such a small overall percentage (.0666666 = 6 2/3%), that the total weight has to be a relatively big number. Looking at the answer choices, there's only one option that makes sense...

Final Answer:

GMAT assassins aren't born, they're made,

Rich

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# Rich Cohen

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