Question 1181039
.
There are seven nickels and five dimes in your pocket. Three times, you randomly pick a coin out of your pocket, 
return it to your pocket, and then mix-up the change in your pocket. All three times, the coin is a nickel. 
Find the probability of this occurring.
~~~~~~~~~~~~~~~~~~~


<pre>
The probability to draw a nickel is  {{{7/(7+5)}}} = {{{7/12}}}  at each single separate trial.


The probability to have such outcome in three trials, as described in this experiment, is  


    {{{(7/12)^3}}} = 0.1985 = 19.85% (rounded).    <U>ANSWER</U>
</pre>

Solved, answered and explained.