Question 1150201
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Same problem (a TWIN) as solved under this link


<A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1150202.html>https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1150202.html</A>


https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1150202.html



The same "mantra" (i.e. method of solution) works, so there is no any sense to repeat it again and again.