Question: Suppose previous mark Mean= 65 Sd= 15 random variable x student population A. Find the proportion of students who received grade HD (a score of

  1. Suppose previous mark Mean= 65 Sd= 15 random variable x student population

A. Find the proportion of students who received grade HD (a score of atleast 80)

B. Find the proportion of who received CD (between 60 and 69)

C. Assume 9% of the students failed in exam. Find the out off marks of failing in exam.

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