6. The weights of bags of popcorn are normally distributed with mean of 200 g and \(60 \%\) of all bags weighing between 190 g and 210 g .
- Write down the median weight of the bags of popcorn.
- Find the standard deviation of the weights of the bags of popcorn.
A shopkeeper finds that customers will complain if their bag of popcorn weighs less than 180 g .
- Find the probability that a customer will complain.