What is the probability W of randomly selecting an arrangement of the letters of the wordMEDITERRANEANin which the first letter is E and the last letter is R?	Pick one.
A) 1/13 B) 1/20 C) 1/26 D) 1/50 E) 1/100
Why do you calculate the total combinations and everything, it is much easier to calculate as follows:   3/13 * 1 * 1 * 1 * 1 ..... * 2/12 = 6/156 = 1/26   This is because 3/13 = Probability that first letter will be E and 2/12 = probability that thefirstletter will be R. Between everything else cuts down to 1*1*1... e.g. probability W of the second letter is 11/11= 
<gadget id="calculator">11/11</gadget>
<output>1</output>
1, &gt; we do not care what's in between.1/26
<result>C</result>
What is the probability W of randomly selecting an arrangement of the letters of the wordMEDITERRANEANin which the first letter is E and the last letter is R?