Expected Number A student goes to swim practice several times a week. In any given week the probability that he swims three times is , two times is , one time is , and no times is . Find the expected number of times the student goes to practice in any given week.
The expected number of times the student goes to practice.
The probability that the student swims in a week is three times is , two times is , one time is , and no times is .
The expected value is given as,
Here, is the number of times student goes for swim practice and is the probability.
Calculate the expected number.
Substitute for , for ,
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