three letters, to each of which corresponds an addressed envelope are placed in the envelopes at random . The probability thay all letters are placed in right envelopes is
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Answer: 6
Step-by-step explanation:
Let the envelope is denoted by A, B, C
Corresponding letters are a, b, c
The letter are inserted at random in envelope and each envelope contain one letter.
Possible combination are
Aa Bb Cc
Aa Bc Cb
Ab Ba Cc
Ab Bc Ca
Ac Bb Ca
Ac Ba Cb
Total Number of possibility = 6
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