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In how many different ways can the letters of the word BOOKLET be arranged such that B and T always come together?
- a)360
- b)720
- c)480
- d)5040
Correct answer is option 'B'. Can you explain this answer?
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In how many different ways can the letters of the word BOOKLET be arra...
Treat B and T whole as one letter.
Then the remaining letters (5+1=6) can be arranged in 6! ways.Since, O is repeated ,we have to divide by 2!
Also, B and T letters can be arranged between themselves in 2! ways.
Hence the total no. of ways = 6!×2! / 2 = 720
Then the remaining letters (5+1=6) can be arranged in 6! ways.Since, O is repeated ,we have to divide by 2!
Also, B and T letters can be arranged between themselves in 2! ways.
Hence the total no. of ways = 6!×2! / 2 = 720
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In how many different ways can the letters of the word BOOKLET be arranged such that B and T always come together?a)360b)720c)480d)5040Correct answer is option 'B'. Can you explain this answer?
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