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2. The amount of annual rainfall in a certain region is known from past experience to be a normally distributed random variable with mean annual

2. The amount of annual rainfall in a certain region is known from past experience to be a normally distributed random variable with mean annual rainfall of 15 centimeters and a standard deviation of 4 centimeters. . If the rainfall exceeds 157 centimeters during a yea, it leads to floods. Find the probability that during a randomly picked year there will be floods.

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