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
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
$\frac{1}{{27}}$
- B
$\frac{1}{9}$
- C
$\frac{4}{{27}}$
- D
$\frac{1}{6}$
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- [IIT 1998]