Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sweetshiva9963 Group Title

How many strings of three decimal digits (0, 1, 2, …, 9) a) do not contain the same digit three times? b) begin with an odd digit?

  • one year ago
  • one year ago

  • This Question is Open
  1. tcarroll010 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    Consider that there are 10 x 10 x 10 total strings of 3-digit numbers (if you allow leading 0's) There are only 10 where all digits are the same (all 0's through all 9's) So, you have: 10 x 10 x 10 - 10 strings where you don't have 3 identical digits. As for your second question, there are: 5 x 10 x 10 that start with an odd digit which happens to be the same as the number that start with an even digit.

    • one year ago
  2. tcarroll010 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    All good now, @sweetshiva9963 ?

    • one year ago
  3. sweetshiva9963 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Yea

    • one year ago
  4. tcarroll010 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    Ok! Glad I was able to help you! @sweetshiva9963

    • one year ago
  5. tcarroll010 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    Good luck to you in all of your studies and thx for the recognition! @sweetshiva9963

    • one year ago
  6. sweetshiva9963 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    your welcome. Thanks for the help

    • one year ago
  7. tcarroll010 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    anytime!

    • one year ago
    • Attachments:

See more questions >>>

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.