16 A farm supplies apples to a supermarket.
The diameters of the apples, \(D\) centimetres, are normally distributed with mean 6.5 and standard deviation 0.73
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- (ii) Find \(\mathrm { P } ( D > 7 )\)
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16- (iii) The supermarket only accepts apples with diameters between 5 cm and 8 cm . Find the proportion of apples that the supermarket accepts.
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16 - The farm also supplies plums to the supermarket.
These plums have diameters that are normally distributed.
It is found that \(60 \%\) of these plums have a diameter less than 5.9 cm .
It is found that \(20 \%\) of these plums have a diameter greater than 6.1 cm .
Find the mean and standard deviation of the diameter, in centimetres, of the plums supplied by the farm.