For an employee to qualify for early retirement at a certain company, the sum of the employee’s age and years of service must be at least 78, If Sue was K years old when she was hired by the company, what is the minimum age at which she could possibly qualify for early retirement?
Choices.
A) K+39  B) 2K+39  C) (78+K)/2  D) (78-K)/2  E) 2(78-K)
Let y be the years of service at the company.   After y years of service, Sue's age will be K + y.   Sue can retire when (K+y) + y = 78   y = (78 - K)/2   Then Sue's age will be K + y = K + (78 - K)/2 = (78+K) / 2   The answer is (78+K)/2.
<result>C</result>
For an employee to qualify for early retirement at a certain company, the sum of the employee’s age and years of service must be at least 78, If Sue was K years old when she was hired by the company, what is the minimum age at which she could possibly qualify for early retirement?