A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Tim wrote a seven digit phone number on a piece of paper he later tore paper accidentally and the last two digits were lost.what is the maximum number of arrangements of two digits, using the digit 0 through 9, that he could use in attempting to reconstruct the correct phone number?
anonymous
 one year ago
Tim wrote a seven digit phone number on a piece of paper he later tore paper accidentally and the last two digits were lost.what is the maximum number of arrangements of two digits, using the digit 0 through 9, that he could use in attempting to reconstruct the correct phone number?

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0we wiil use the ncr or the npr and why

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So, there are 10 digits that could go in the first spot and there are 10 digits that could go in the second spot. 10 X 10 is equal to what?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what is the meaning of 0 through 9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Its basically saying how many combinations can you get with the numbers 0 through 9. Order does matter since this is a telephone number. With 0 as the lead coefficeint you can have: 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 So you can have 10 combinations when 0 is the lead. Well you will get 10 more when 1 is the lead, 2 is the lead, 3 is the lead, 4 is the lead, 5 is the lead, 6 is the lead, 7 is the lead, 8 is the lead, and 9 is the lead. Add them all up and you get 100.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i get your think but i want to know can i do it by calc using the npr or the ncr

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0too much work there are 100 two digit numbers use nothing but common sense

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and if i do it by the npr its come 90 not 100

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You don't need npr or ncr it's a logic question... very simple question at that.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0You can also think of a 10x10 table (10 rows, 10 columns) so there would be 10*10 = 100 entries. The entries would be this sequence 00,01,02,...,97,98,99

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes exactly it's so simple that using something so complex will give you the wrong answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Trust me I had this same question Last Year and made the same mistake you did.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but i need to know bec the my mr asking me i will use the ncr or the npr or none

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes you won't use it because none is required

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok thnak u @shelbygt520

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0npr and ncr are only used if repeated digits are NOT allowed but in this case, a phone number like 5550202 is possible. So repeated digits are allowed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and u too@jim_thompson5910

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry but can i use the digit 10 @shelbygt520

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No because you are only aloud to use digits 0 through 9 or 0123456789

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok but if i aloud the 10 they wiil be 11*11

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0"10" is composed of "1" and "0" shelbygt520 has the right idea

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no because 10 would be 2 digits making it impossible to use it and another digit so you would essentially end up with 101

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0although as @jim_thompson5910 said 10 is composed of the digits 1 and 0 making it a combination within itself.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh ya thanks friends

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the q can write as how many 2digits formed from 0,1,2,3,4,5,6,7,8,9 @shelbygt520

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what i writ wrong or write

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0yeah how many ways to make a 2 digit number

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can i write it like this so the q can write as how many 2digits formed from 0,1,2,3,4,5,6,7,8,9 write or wrong

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0yeah that's one way to think of it how many ways to form a 2 digit number

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0the other digits of the phone number don't matter

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank u @jim_thompson5910
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.