(i)[3]
Find the probability that a randomly chosen apple can be used as a toffee apple.
(ii)[5]
$250$ apples are selected at random. Use an appropriate approximation to determine the probability that fewer than $50$ can be used as toffee apples.
Mathematics 9709 · AS & A Level · Continuous random variables
Continuous random variables — practice question
The diameters of apples in an orchard are normally distributed, with mean $5.7\text{ cm}$ and standard deviation $0.8\text{ cm}$. Apples whose diameters lie between $4.1\text{ cm}$ and $5.0\text{ cm}$ may be used for toffee apples.
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