Amessage center receives calls from 6 p. m. until 6 a. m. typically, 50% of the calls come in between 6 p. m. and 9 p. m.; 25% of the calls come in between 9 p. m. and midnight; 20% of the calls come in between midnight and 3 a. m.; and 5% of the calls come in between 3 a. m. and 6 a. m. what is the probability that a call will come in between 6 p. m. and midnight? question 5 options: 25% 50% 55% 75%