In a class on 100 students, 80 students passed in all subjects, 10 failed in one subject, 7 failed in two subjects and 3 failed in three subjects. Find the probability distribution of the variable for number of subjects a student from the given class has failed in. In python
Answers
20/100=1/5
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Given : In a class on 100 students, 80 students passed in all subjects,
To find : probability distribution
Solution:
In a class on 100 students, 80 students passed in all subjects,
=> Failed in 0 subjects = 80
Failed in 1 subject = 10
Failed in 2 subjects = 7
Failed in 3 Subjects = 3
Probability of Failing in 0 subjects = 80/100
Probability of Failing in 1 subjects = 10/100
Probability of Failing in 2 subjects = 7/100
Probability of Failing in 3 subjects = 3/100
Expected number of subjects in which failed = 0 * (80/100) + 1(10/100) + 2(7/100) + 3(3/100)
= (0 + 10 + 14 + 9)/100
= 33/100
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