Find the probability and the inverse of the following problems.
The following three problems (i.e., problems 1-3) refer to the following information:
presume the scores on an exam are normally distributed with mean μ = 75 points, and standard deviation σ = 8 points.
1. The instructor wanted to "pass" anyone who scored above 69. What proportion of exams would have passing scores?
a..25
b..75
c..2266
d..7734
e.-.75
2. What is the exam score for an exam whose z-score is 1.25?
a.65
b.75
c.85
d..8944
e..1056
3. Presume that the top 4 percent of the exams will be given an A+. In order to be given an A+, an exam must earn at least what score?
a.61
b.73
c. .516
d.77
e. 89