Solution: What is the probability that at least one of them got a credit?

The probability of getting a credit in an examination is 1/3. If three students are selected at random, what is the probability that at least one of them got a credit?

 What is the probability that at least one of them got a credit?

Problem Statement: ECE Board March 1996

The probability of getting a credit in an examination is 1/3. If three students are selected at random, what is the probability that at least one of them got a credit?

Problem Answer:

The probability that at least one of the students got a credit is 19/27.

Solution:

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