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GMATprep 1 ps problem 1

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by ikant » Thu Mar 20, 2008 8:26 am
Hi,

Here is the soln the answer is 27(26)^4.

No. of 4 letter codes formed = (26)^4.

No. of 5 letter codes formed = (26)^5.

So total no. of codes = (26)^4(1+26)
= 27(26)^4.
"To do is to be"
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Junior | Next Rank: 30 Posts
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by gmatjoe » Thu Mar 20, 2008 9:42 am
many thanks.
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