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Find the expected value of the number of tests taken.

A calculus instructor uses computer aided instruction and allows students to take the midterm exam as many times as essential until a passing grade is obtained. Following is a record of the number of students in a class of 20 who took the test each number of times.

Students

Number of tests

10

1

7

2

2

3

1

4

Find out the expected value of the number of tests taken.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920785

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