The playing time X of jazz CDs has the normal distribution w

The playing time X of jazz CDs has the normal distribution with mean 52 and standard deviation 7; N(52, 7). According to the 68-95-99.7 rule, what percentage of jazz CDs play exactly 50 minutes?

Solution

For a normal distribution, for us to define a probability, we need to have an interval (between two values).

As \"exactly 50 minutes\" is not an interval, then

P(exactly 50 minutes) = 0 [ANSWER]