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Question

In how many different ways can the letters of the word MONDAY be arranged ? How many arrangements begin with M ? How many begin with M and do not end with N ?

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Solution

Solution :-

Given word MONDAY

Total ways to arrangement 6 letters = 6!
we have to find arrangement so that,
(i)

words so formed begin with M

No. of choice for 1st letter = 1

For 2th,3th,4th,5thand6th letter, number of choices = 5, 4, 3, 2, 1

Number of ways = 1×5×4×3×2×1=120


(ii)

words so formed begin with M and don't end with N
Total letters = 6
No. of choice for 1st letter = 1
No. of choice for last letter = 4
For 2th,3th,4th,5th letters no. of choice = 4,3,2,1
Number of ways = 1×4×4×3×2×1=96

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