Question 1172435
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	36-50	Over 50	Total
Yes	81	157	238
No	169	93	262
Total	250	250	500
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There are 250 people over age 50. Look at the bottom of the "over 50" column to see this total. Let A = 250.


There are 500 people overall (bottom right corner). Let B = 500.


The probability of picking someone over 50 is A/B = 250/500 = 1/2.


Answer: 1/2
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