This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Number of cases of malaria detected in 10yrs are 100, 160, 190, 250, 300, 300, 320, 320, 550, 380. How to calculate the average number of cases per year- \nSelect and explain. \nA. Arithmetic mean, B. Geometric mean, C. Mode, D. Median', 'role': 'user'}, {'content': "Answer: A \nExplanation: In this question there is no extreme value.\nWhen there is no extreme value, arithmetic mean is the most commonly used statistical average.\nOption 'b' requires specific mention here -\n\n\nGeometric means\n\nGeometric mean is a type of average, which indicates the central tendency of a set of number.\nIt is similar to arithmetic mean, except that instead of adding the set of numbers and then dividing the sum by the count of numbers in the set, in geometric mean the numbers are multiplied and then nth root of the resulting product is taken (n is the count of numbers in the set).", 'role': 'assistant'}]