Trading volume on a major stock exchange is approximately normally distributed with a mean of 232 million shares and a standard deviation of about 44 million shares.
a. What is the probability that the trading volume will be less than 200 million shares?
b. If the exchange wants to issue a press release when trading volume is in the top 2% of trading days, what trading volume would trigger a press release?
c. What percentage of the time does the trading volume exceed 300 million shares?