<PRE><B>Question 935105</B>
A) A college wants to create an easily accessible 7-digit telephone to be used for registration purpose. 
Pattern:: 777????
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The first 3 digits must be 777 while remaining four cannot be 0 or 1 and no repetition are allowed. Find all possibilities.
Ans:: 1*1*1*8*7*6*5 = 1680
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 B) repeat A with repetitions allowed.
Ans:: 1*1*1*8*8*8*8 - 4096
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Cheers,
Stan H.
 </PRE>