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Probability

  • If E and F are two events associated with the sample space of a random experiment, then the conditional probability of event E, given that F has already occurred, is denoted by P(E/F) and is given by the formula:

P (E/F) =, where P (F) ≠ 0

 

Example:

A die is rolled twice and the sum of the numbers appearing is observed to be 7. What is the conditional probability that the number 3 has appeared at-least once?

 

Solution:

Let E: Event of getting the sum as 7 an…

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