Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

jishan

  • 2 years ago

Three letters are dictated to three persons & 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 probability that at least one letter is in its proper envelope.

  • This Question is Closed
  1. kropot72
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Let the 3 letters be identified as a, b and c. The total number of arrangements of the letters is as follows: a b c a c b b a c b c a c a b c b a Given that the envelopes are in the order a, b, c, can you see how many of the six possible arrangements will match at least one letter with the correct envelope?

  2. jishan
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is prob ??????

  3. kropot72
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    In four out of the six possible arrangements at least one letter is matched with the correct envelope. So what is the probability of a match?

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.