3 The times for a certain car journey have a normal distribution with mean 100 minutes and standard deviation 7 minutes. Journey times are classified as follows:
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'short' (the shortest \(33 \%\) of times),
'long' (the longest \(33 \%\) of times),
'standard' (the remaining 34\% of times).
- Find the probability that a randomly chosen car journey takes between 85 and 100 minutes.
- Find the least and greatest times for 'standard' journeys.
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