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Question: Three letters are to be sent to different persons and addresses on the three envelopes are also writ...

Three letters are to be sent to different persons and addresses on the three envelopes are also written. Without looking at the addresses, the probability that the letters go into the right envelope is equal to

A

127\frac { 1 } { 27 }

B

19\frac { 1 } { 9 }

C

427\frac { 4 } { 27 }

D

16\frac { 1 } { 6 }

Answer

16\frac { 1 } { 6 }

Explanation

Solution

Total no. of ways placing 3 letters in three envelops =3!= 3 ! out of these ways only one way is correct.

Hence the required probability