a teacher decides to fail 25% of the class.Examination marks are roughly normally distributed w/a mean of 72 & standard deviation of 6. what mark must a student make to pass?

Answer 1

If the marks of 300 students are normally distributed with mean 68 Marks and standard deviation 3 Marks, how many students have marks. (i) Greater than 72 (ii) Between 65 and 71 Marks (iii) Less than 64 Marks

Answer 2

A teacher decides to fail 25 percent of the class. Examination marks are roughly normally distributed, with a mean of 72 and a standard deviation of 6. What mark must a student make to pass?.