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probability 1) Three letters are dictated to three persons and an envelope is addressed to each of them, the letters are inserted into the envelopes at random so that each envelope contains exactly one letter. Find the probability that at least one letter is in its proper envelope.

probability
1) Three letters are dictated to three persons and an envelope is addressed to each of them, the letters are inserted into the envelopes at random so that each envelope contains exactly one letter. Find the probability that at least one letter is in its proper envelope.

Grade:11

2 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
7 years ago
Total number of ways=3!=6
At least one letter in correct=exactly one letter in correct+all in correct
=3+1
probablity =4/6

Sher Mohammad
B.tech, IIT Delhi
moidin afsan
20 Points
7 years ago
thak u

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