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Finding probability value for the given data using normal approximation

The annual precipitation amounts in a certain mountain range are normally distributed with the mean of 99 inches, and a standard deviation of 14 inches. What is the likelihood that the mean annual precipitation during 49 randomly picked years will be less than 101.8 inches?

a.0.9192

b.0.4192

c.0.0808

d.0.5808

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