Question 1139182
.
<pre>

From the first statement, the probability for any one part to be defective is  P = 0.035   (which is 3.5%).


It means that the probability for any one part to be fair (with no defects) is  Q = 1 - 0.035 = 0.965.


Then the probability for 20,000 parts to be with zero defects is  {{{Q^20000}}} = {{{0.965^20000}}} = {{{(1-P)^20000}}}.


It is the formula you are asking for.    <U>ANSWER</U>
</pre>