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by VP_Jim » Tue May 05, 2009 12:57 pm
We have two variables (let's say m and w), so we need two equations. One equation is given in the question stem:

m + w = 1400

And Statement 1 provides us with another:

.36m + .50w = .42(1400)

Hence, (1) is sufficient since we have two unique equations and two variables.

Statement 2 tells us that 1400(.42) - 288 = 300 women have research goals, but it doesn't tell us how many women were surveyed.

So, (A) is the answer. Hope this helps!
Jim S. | GMAT Instructor | Veritas Prep
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by rahuljones1 » Wed May 06, 2009 8:49 am
VP_Jim wrote:We have two variables (let's say m and w), so we need two equations. One equation is given in the question stem:

m + w = 1400

And Statement 1 provides us with another:

.36m + .50w = .42(1400)

Hence, (1) is sufficient since we have two unique equations and two variables.

Statement 2 tells us that 1400(.42) - 288 = 300 women have research goals, but it doesn't tell us how many women were surveyed.

So, (A) is the answer. Hope this helps!
Thanks Jim !! Explanation is very helpful !!
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