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Given an alphabet of 26 letters, with 21 consonants, and 5
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sandy
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GRE 1: Q167 V156
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Given an alphabet of 26 letters, with 21 consonants, and 5 [#permalink] New post  30 Dec 2017, 13:26
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Given an alphabet of 26 letters, with 21 consonants, and 5 vowels, approximately how many three-letter words can be formed with a vowel as the middle letter and a consonant as the last letter?

A. 1000
B. 1500
C. 2500
D. 3500
E. 4000

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Question: 2
Page: 559

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sandy
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Re: Given an alphabet of 26 letters, with 21 consonants, and 5 [#permalink] New post  30 Dec 2017, 14:36
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Explanation

When you see the word approximately, you are being told to Ballpark. In this case, you have 26 possibile letters for that slot, 5 for the second slot, and 21 for the third slot. Estimate and call this 25 × 20 × 5.

The total is 2,500, so select choice C.
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boxing506
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Re: Given an alphabet of 26 letters, with 21 consonants, and 5 [#permalink] New post  30 Dec 2017, 22:26
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can u explain this more thoroughly?
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sandy
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Re: Given an alphabet of 26 letters, with 21 consonants, and 5 [#permalink] New post  31 Dec 2017, 06:23
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boxing506 wrote:
can u explain this more thoroughly?


We have to select 3 letters.

There are 26 options for first letter and 5 for the second letter finally we have 20 consonent options for the last poistion.

Hence total possible combinations = 26 * 5 * 20 =2600.
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Re: Given an alphabet of 26 letters, with 21 consonants, and 5 [#permalink] New post  30 May 2021, 14:45
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