the monthly charges for cell phone plans are normally distributed with mean u deviation a 20 a normal curve with the parameters labeled e the region that represents the proportion of plans that charge less than 48 ose the area under the normal curve to the left of X 48 is 0 1587 Provide an ation of this result et the correct choice below and fill in the answer box to complete your choice whole number The probability is 0 1587 that a randomly selected cell phone plan in this populatie ess than per month The probability more than is 0 1587 that a randomly selected cell phone plan in this populatic per month