<PRE><B>Question 1200636</B>
.



&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;Probably, &amp;nbsp;the shortest way to answer questions &amp;nbsp;(a) &amp;nbsp;and &amp;nbsp;(b) &amp;nbsp;is &amp;nbsp;THIS



&lt;pre&gt;
(a)  P = {{{(12/100)*(11/99)}}} = {{{(12/100)*(1/9)}}} = {{{(4/100)*(1/3)}}} = {{{(1/25)*(1/3)}}} = {{{1/75}}} = 0.1333  (rounded).    &lt;U&gt;ANSWER&lt;/U&gt;



(b)  P = {{{((100-12)/100)*((100-13)/99)}}} = {{{(88/100)*(87/99)}}} = {{{(88*87)/(100*99)}}} = {{{(8/9)*(87/100)}}} = {{{(2/9)*(87/25)}}} = {{{(2*87)/(9*25)}}} = {{{174/225}}} = 0.7733  (rounded).    &lt;U&gt;ANSWER&lt;/U&gt;
&lt;/pre&gt;

Solved.


These formulas do not require explanations: they are SELF-EXPLANATORY and speak for themselves.



</PRE>