Please do include the steps.
1. Scores for a civil service exam are normally distributed, with a mean of 75 and sd of 6.5. To be eligible for civil service employment, you must score in the top 10%. What is the lowest score you can earn and still be eligible for employment?
A. The lowest score you can earn and still be eligible for employment is 75
B. The lowest score you can earn and still be eligible for employment is 83.32
C. The lowest score you can earn and still be eligible for employment is 84.5
2. The length of time employees have worked at a corporation is normally distributed, with a mean of 11.2 years & sd of 2.1 years. In a company cutback, the lowest 5% in seniority are laid off. What is the maximum length of time an employee could have worked and still be laid off?
A. 9 years and above
B. 7.75 years and below
C. 9 years and below