GRE QUANT: DATA ANALYSIS, SET THEORY
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The document contains information about the number of physicians in different medical specialties based on a survey of 200,000 physicians. It also contains a bar chart showing the percentage and number of physicians in each specialty, with internal medicine and surgery having the highest percentages at 25% and 24% respectively. A second section contains data from a survey of 250 travelers showing the number who traveled to Africa and/or Asia. It includes equations to calculate the number of travelers who visited each continent alone or both. The final section shows a data table and calculates the mean of the y values, which is 1.29.
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GRE QUANT: DATA ANALYSIS, SET THEORY
- 1. GRE QUANT SET THEORY, BAR CHARTS
- 2. pediatrics internal medicine surgery anasthesiology psychiatry pathology radiology others 21% 25% 24% 3% 6% 3% 3% 15% 200,000 physicians Question 1
- 3. Which of the following sectors represents more than 40,000 physicians a) Pediatrics. b)Internal medicine. c) Surgery. d) Anesthesiology. e) Psychiatry 20% of 200,000 = 40,000 Pediatrics, internal medicine and surgery are all more than 20% Hence a, b and c represent more than 40,000 physicians
- 4. Type equation here.a70 7 7 0 Africa 93 Asia 155 70 250 travellers surveyed a) How many travellers have travelled to Africa but not Asia 93- 70 = 23 Question 2
- 5. b) How many have travelled to at least one of the 2 continents 𝑛 𝐴 ∪ 𝐵 = 𝑛 𝐴 + 𝑛 𝐵 − 𝑛(𝐴 ∩ 𝐵) = 93 + 155 − 70 = 178
- 6. c) How many have travelled neither to Africa nor Asia 𝑛 𝐴 𝐶 ∩ 𝐵 𝐶 = 𝑛(𝐴 ∪ 𝐵) 𝐶 = 250 − 178 = 72 Question 3 For the following table, what is the mean Give your answer to the nearest 0.01