Question 1175388
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<H1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D U P L I C A T E</H1>


I just solved it under the link


<A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1175389.html>https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1175389.html</A>


https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1175389.html



I answered questions (a) and (b) and noticed in that my post that question (c) is the same as (b)

and your question (d)  makes no sense.


<H1>So PLEASE stop posting unnecessary duplicates.</H1>


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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The solution by @ewatrrr is &nbsp;ABSOLUTELY &nbsp;WRONG.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This problem &nbsp;IS &nbsp;NOT &nbsp;on binomial distribution.



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I repeated it &nbsp;MANY &nbsp;TIMES &nbsp;at this forum and can repeat it again:


<H3>&nbsp;&nbsp;&nbsp;&nbsp;This women chronically can not solve combinatoric problems, 
&nbsp;&nbsp;&nbsp;&nbsp;as well as elementary probability problems.
&nbsp;&nbsp;&nbsp;&nbsp;She does not know the subject and does not know the basics.


&nbsp;&nbsp;&nbsp;&nbsp;Avoid her posts on the subject (combinatorics and elementary probability).

&nbsp;&nbsp;&nbsp;&nbsp;They practically ALL are wrong (!)


&nbsp;&nbsp;&nbsp;&nbsp;Concretely in this case, ignore her solution (!)</H3>