In a certain orchard, the number of apples (a) in a tree
is normally distributed with a mean of 300 apples and
a standard deviation of 30 apples. Find the probability
that a given tree has between 330 and 390 apples.
99.7%-
95%-
-68%-
210 240 270 300 330 360 390
P(330 < a <390) = [?]%
Be sure to use the 68%-95% -99.7% rule and do not round.
Enter