Question 1153770
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            The problem does not say that the given events are  INDEPENDENT,  and it is problem's formulation  FAULT.


            It  MUST  say it.  In my solution,  I will assume the the events are independent.


            Then



<pre>
(a)  P = P(Ramon)*P(Simon).



(b)  P = P(Ramon)*(1-P(Simon)) + (1-P(Ramon))*P(Simon).
</pre>

<U>You</U> complete calculations by substituting the given data.