A sample of 100 customers of Montana Gas and Electric resulted in the following frequency distribution of monthly charges. Amount ($) 0-49 50-99 100-149 150-199 200-249 Number 13 22 34 26 5 a. Let A be the event that monthly charges are $150 or more. Find P(A). b. Let B be the event that monthly charges are less than $150. Find P(B).
