Question: According to a recent poll, smart phone users receive an average of4 phone calls each day. LetX= the number of phone calls that smartphone users

According to a recent poll, smart phone users receive an average of4 phone calls each day.

LetX= the number of phone calls that smartphone users receiveper day. The random variableX has a Poisson distribution:X~P(4).

What is the probability that a smartphone users receivesexactly3phone calls per day? (Rounded to the thousandths place.)

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