The length of sweetpea flower stems are normally distrusted with mean and standard deviation .
(a) Find the probability that the length of a flower stem is between and .
(b) of the flower stems are longer than h cm. of the flower stems are shorter than k cm. Find and .
(c) Stem lengths less than are unacceptable at a florist's shop. In a batch of sweetpeas estimate how many would be unacceptable.
Answer in textbook is 0.614
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