Question 1132797
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(a)    find the probability that the failure is due to loose keys.


<pre>
    0.88*0.27 = 0.2376 = 23.76%.            <U>ANSWER</U>
</pre>


(b)  &nbsp;&nbsp;find the probability that a failure is due to improperly connected or poorly welded wires


<pre>
    0.12*(0.13 + 0.52) = 0.078 = 7.8%.      <U>ANSWER</U>
</pre>


The formulas are self-explanatory . . .