ATQ, Average age of 15 employees = 32 years Sum of the ages of 15 employees = 32 × 15 = 480 After including the age of 2 directors and 1 supervisor, new average age = 34 years Sum of the ages of 15 employees including directors and supervisor = 34 × 18 = 612 Sum of the ages of 2 directors and 1 supervisor = 612 – 480 = 132 Average age of 2 directors and 1 supervisor = 132/3 = 44 years
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