When Savannah commutes to work, the amount of time it takes

Last updated: 7/17/2022

When Savannah commutes to work, the amount of time it takes her to arrive is normally distributed with a mean of 28 minutes and a standard deviation of 3.5 minutes. Out of the 213 days that Savannah commutes to work per year, how many times would her commute be shorter than 22 minutes, to the nearest whole number? a 104 b 321 c 9 d 56