Add the given salaries:
43,000 + 62,000 + 53,000 + 75,000 + 61,000 + 50,000 + 48,000 = $392,000
The mean is 392,000 / 7 = $56,000
The mean salary doubles when the CEO is added, so the mean salary would be 56,000 x 2 = 112,000
Multiply the new mean by a total of 8 people to get the total salaries:
112,000 x 8 = $896,000
Now to find the CEO salary, subtract the 7 person total from the 8 person total:
CEO Salary = 896,000 - 392,000 = $504,000