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

lilai3

Who <333333333333s communnicaaatioooooooooon????????? How many phone numbers are possible for one area code if the first four numbers are 202-1, in that order, and the last three numbers are1-7-8 in any order?

  • one year ago
  • one year ago

  • This Question is Closed
  1. shivam_bhalla
    Best Response
    You've already chosen the best response.
    Medals 0

    I think it is 3!

    • one year ago
  2. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 2

    There are 7 digits total. The first 4 are locked in at 202-1 So there are 7-4 = 3 digits left The last three numbers are 1-7-8 in any order and there are 3! = 3*2*1 = 6 ways to order them So there are 1*6 = 6 different phone numbers.

    • one year ago
  3. lilai3
    Best Response
    You've already chosen the best response.
    Medals 0

    Also for this question: Juan and Andrew are planning the schedule for a softball tournament. If there are 6 teams, how many different pairings could they make for the first tournament game? Is the answer to this one^^^^^ 6! which is 720 different pairings????? thank you got ur help!

    • one year ago
  4. shivam_bhalla
    Best Response
    You've already chosen the best response.
    Medals 0

    SimplyC(6,2)

    • one year ago
  5. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 2

    There are 6 teams to choose for the first slot (say the "home" slot) and 6-1 = 5 teams to choose for the second ("away/visitor") slot So there are 6*5 = 30 different ways to do this.

    • one year ago
  6. lilai3
    Best Response
    You've already chosen the best response.
    Medals 0

    oh so it's 30 instead for the answer to question number 2?

    • one year ago
  7. jim_thompson5910
    Best Response
    You've already chosen the best response.
    Medals 2

    If it's all being played on one field, then order doesn't matter, so you would divide by 2 to avoid the double counting.

    • 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.