Question #242165

The random variable  represents the amount gain by a person who buys a 20peso ticket from a total of 1000 tickets for a raffle whose winner will obtain ₱5,000.  



1
Expert's answer
2022-02-01T12:18:33-0500

P(X=−20)=0.999.P(X=-20)=0.999.

P(X=4980)=0.001.P(X=4980)=0.001.

E(X)=−20∗0.999+5000∗0.001=−14.98.E(X)=-20*0.999+5000*0.001=-14.98.


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