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The number of ways of 5 letters put in 5...

The number of ways of 5 letters put in 5 addressed envelopes so that one letter is in right envelop and all the remaining are placed in wrong envelopes is

A

45

B

44

C

120

D

25

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
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  4. Ravish writes letters to his five friends and addresses the correspond...

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  5. Statement-I : The number of ways of arranging the letters of the word ...

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  10. IF ""^(15)C(r+3)=""^(15)C(2r-3), then r=

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