How many words can be formed by using 3 letters from the word 'DELHI'?


A

60


B

180

C

120


D

70


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Question: How many words can be formed by using 3 letters from the word 'DELHI'? 

Solution:
Here we will use the Permutations for this question.
We know,
​ nPr, for this we have,
n = 5, Total 5 Letters
r = 3, Letters word we required

​Now,
nPr = n!/(n-r)!
5P3 
​= 5!/2! 
​= 120/2 
​= 60

So, Total we can form 60 different permutation of word from Letter Delhi.

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Updated: 18 hours ago

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