<PRE><B>Question 1174019</B>
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A recent study found that 40% of all people over age of 62 wear hearing aids. If a random sample of 5 people over 62 is selected, 
find the probability that exactly two people wear hearing aids. (please round off into 3 decimal places).
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&lt;pre&gt;
It is the binomial type probability distribution.


The number of trial n= 5; the probability of the success trial is  40% = 0.4,  and the number of success trial is  k = 2. 


    P(2) = {{{C[5]^2*0.4^2*(1-0.4)^3}}} = {{{10*0.4^2*0.6^3}}} = 0.346.      &lt;U&gt;ANSWER&lt;/U&gt;
&lt;/pre&gt;

Solved.


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To see many other similar solved problems, look into the lessons

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Solving-problems-on-Binomial-distribution-manually.lesson&gt;Simple and simplest probability problems on Binomial distribution&lt;/A&gt; 

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Typical-binomial-distribution-probability-problems.lesson&gt;Typical binomial distribution probability problems&lt;/A&gt; 

in this site.



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