Maximum likelihood estimator

3. Consider a class of 11 students in an introductory mathematical statistics course. The instructor has decided to emplo},r some standard statistics theorj,r in the calculation of the nal course grades. She tells the class that the A grade; in the course will correspond to overall percentages of at least t%, where t' corresponds to the ninetieth percentile of the following truncated gamma distribution: 1 E mirm tlel = m-n: U