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Question
The probability that a student entering a university will graduate is 0.4. Find the probability that out of 3 students of the university only one will graduate .
Solution
Let X be the number of students that graduate from among 3 students.
Let p=probability that a student entering a university will graduate.
Here , n =3, p=0.4 and q = 0.6
Hence, the distribution is given by
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