Quantcast
Channel: GMAT Club Forum - Forums > Reading Comprehension (RC)
Viewing all articles
Browse latest Browse all 291973

Problem Solving (PS) | Re: How many 3-letter code words can be formed if at least one of the lett

$
0
0
MM2008 wrote:

Why do we not get the same result if we do (21*21*5) + (21*5*5) + (5*5*5)
i.e., (2 consonants and 1 vowel OR 1 consonant and 2 vowels OR 3 vowels)?


That approach does not account for the different permutations of the first two cases, so it should be 3*(21*21*5) + 3*(21*5*5) + (5*5*5)

Statistics : Posted by Bunuel • on 03 Jan 2021, 12:50 • Replies 5 • Views 9486



Viewing all articles
Browse latest Browse all 291973

Latest Images

Trending Articles



Latest Images

<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>