The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70 inches, and a standard deviation of 10 inches. What is the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches

The probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches is 0.3897

Step-by-step explanation:

Mean =

Standard deviation =

We are supposed to find the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches

We will use z-score formula :

We will use z table

Hence  the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches is 0.3897

for b its (t) and c its (d)

step-by-step explanation:

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