Question: In a survey of 190 manufacturing companies, 103 hired operators, 67 hired technicians, and 49 hired both operators and technicians, as illustrated in the Venn diagram below:
How many companies sureveyed hired at least one category of employees: operators and technicians? (a) 130
49 companies hired both operators and technicians.
103 - 49 = 54 companies hired operators only.
67 - 49 = 18 companies hired technicians only.
The number of companies sureveyed that hired at least one category of employees is 49 + 54 + 18 = 121.
Question: In which year did the Company A's revenues increase the most from the year before?
The slope of the line between 1972 and 1973 is higher than all of the other slopes, so the Company A's revenues increased the most from 1972 to 1973.