A community for students.
Here's the question you clicked on:
 0 viewing
sweetshiva9963
 3 years ago
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?
sweetshiva9963
 3 years ago
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?

This Question is Open

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Consider that there are 10 x 10 x 10 total strings of 3digit 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.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0All good now, @sweetshiva9963 ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Ok! Glad I was able to help you! @sweetshiva9963

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Good luck to you in all of your studies and thx for the recognition! @sweetshiva9963

sweetshiva9963
 3 years ago
Best ResponseYou've already chosen the best response.0your welcome. Thanks for the help
Ask your own question
Sign UpFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.