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Civil Engg. (GATE) 2012
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The annual precipitation data of a city is normally distributed with mean and standard deviation as 1000 mm and 200 mm, respectively. The probability that the annual precipitation will be more than 1200 mm is
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A
< 50%
💡 Explanation:
In a normal distribution, the mean is 1000. 1200 is one standard deviation (200) above the mean. Since the distribution is symmetric, the area above the mean is 50%, and the area above one standard deviation is less than 50%.