GRE Sample Test 4 Quantitative Reasoning 2

How many male general surgery physicians were under 35 years old? The pie chart breaks down general surgery physicians by age, so work with that. And because you’re looking for a number of general surgery physicians, you know that you’re going to have to find the total number of general surgery physicians and then break it down according to the percentages on the pie chart.
The number of female general surgery physicians in the under-35 category represented 3.5% of all the general surgery physicians. What this does is break that slice of the pie for under-35 into two smaller slices, one for men under 35 and one for women under 35. Now the whole slice for under- 35-year-olds is 30% of the total, and the question states that the number of females under 35 is 3.5% of the total. So the difference between 30% and 3.5% (26.5%) must be the men in the under-35 category.
From the top graph, estimate the total number of general surgery physicians as 37,000 (35,000 male plus 2,000 female). Multiply 37,000 by 26.5%:
0.265 × 37,000 = 9,805, which is very close to (B), the correct answer.