Latest TCS Aptitude Question SOLUTION: In how many ways can the letters of the English alphabet be arranged so that are seven letters between the letters A and B, and no letter is repeated? o 18*241 o 36*241 o 24p7*2*18

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In how many ways can the letters of the English alphabet be arranged so that are seven letters between the letters A and B, and no letter is repeated?
o 18*241
o 36*241
o 24p7*2*18!
o 24P7*2*20!

Asked In TCS Nakshatra Mukhopadhyay (8 years ago)

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Read Solution (4) :

saffan  (8 years ago)

given case can be shown as follows.
A (QWERTYU) B OPLKJHGFDSZXCVNM
A and B can be arranged in 2! ways.
24 letters remaining.
7 letters between A and B (let assume QWERTYU as shown above) can be selected in 24P7 ways.
now remaining letters are 18 (assume IOPSDFGHJKLMNVCXZ as above)
these 18 letters can be arranged in 18! ways.
answer 24P7*2*18!

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Subhadip das  (8 years ago)

24p7*2*18!

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Vanshikha Gupta  (8 years ago)

the answer of this ques is 24c7*7!*2

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sarigha  (4 years ago)

can't understand

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