Weight 2) The mean weight of 12 people in an elevator is 178 lb. A thirteenth person enters the elevator at the next floor. What should be the weight of the 13th person to raise the mean weight by 1 pound? a) O 191 b) O 178 c) 179 d) 156S26340 Weig 3) The mean of 220 items was 55. Later on it was discovered that two items were wrongly read as 93 and 7 instead of 170 and 84. Find the correct mean. a) 0 55 b) 0 55.7 C) 0 84 d) 0 93