<h3>
Answer: 78.6</h3>
Work Shown:
Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.
The values in the third column add to 810+1440+1050 = 3300
Divide this over the total number of people which is 9+18+15 = 42
The mean is 3300/42 =78.571 approximately which rounds to 78.6
37 because if you divide 148 pages into 4 days, it will give you 37 pages per day.
The mistake is line 4, she should have divided 42 by 5, not add 5 and 16
24x(1)Y(1)- x(1)Y(3)+x(2)