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GOODMAN Group Title

How many 7 digit phone numbers can be formed if the first digit cannot be 0 or 1?

  • 2 years ago
  • 2 years ago

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  1. imranmeah91 Group Title
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    well, let's write out each posibility for each digit and then multiply

    • 2 years ago
  2. GOODMAN Group Title
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    I was told to use the Counting Principle

    • 2 years ago
  3. imranmeah91 Group Title
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    first one can't be 0 or 1 , so we got only 8 possibilities

    • 2 years ago
  4. RyanE Group Title
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    8*10*10*10*10*10*10

    • 2 years ago
  5. imranmeah91 Group Title
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    the other digits have 10 possibilties so we multiplies them all

    • 2 years ago
  6. GOODMAN Group Title
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    Okay, so we delete 2 outta the 10 possibliity.

    • 2 years ago
  7. imranmeah91 Group Title
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    like Ryan did above

    • 2 years ago
  8. lgbasallote Group Title
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    you're not planning on stalking someone are you @GOODMAN /:) he

    • 2 years ago
  9. GOODMAN Group Title
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    Wait, how do we know that the others have 10 possibilities, doesnt it apply to the others as well?

    • 2 years ago
  10. lgbasallote Group Title
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    jk goodie :DDD

    • 2 years ago
  11. imranmeah91 Group Title
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    well, only first digit can't be 0 or 1 ; other digits can be any number from 0 to 9

    • 2 years ago
  12. GOODMAN Group Title
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    Ohhh, okay, got it!

    • 2 years ago
  13. GOODMAN Group Title
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    I need help with one more if you dont mind..

    • 2 years ago
  14. GOODMAN Group Title
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    A photographer is taking a picture o f a bride and groom together with 6 attendants. How many ways can he arrange the 8 people in a line if hte bride and groom stand in the middle?

    • 2 years ago
  15. imranmeah91 Group Title
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    @satellite73

    • 2 years ago
  16. satellite73 Group Title
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    yes?

    • 2 years ago
  17. imranmeah91 Group Title
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    little help with photographer problem

    • 2 years ago
  18. satellite73 Group Title
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    ok ____, ___, ____, B G ____, ____, _____

    • 2 years ago
  19. satellite73 Group Title
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    \[6!\]

    • 2 years ago
  20. GOODMAN Group Title
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    Thats it?

    • 2 years ago
  21. imranmeah91 Group Title
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    yep

    • 2 years ago
  22. GOODMAN Group Title
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    How?

    • 2 years ago
  23. satellite73 Group Title
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    that looks right to me

    • 2 years ago
  24. agreene Group Title
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    what all of a sudden this has to be in base 10?

    • 2 years ago
  25. satellite73 Group Title
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    this might surprise you and this might amaze you

    • 2 years ago
  26. satellite73 Group Title
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    but i am going to knock out joe frazier !

    • 2 years ago
  27. GOODMAN Group Title
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    Huh?

    • 2 years ago
  28. satellite73 Group Title
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    btw it is \[6!=6\times 5\times 4\times 3\times 2=720\]

    • 2 years ago
  29. GOODMAN Group Title
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    Yea, i knw what factorials are, but whats is Joe Frazier got to do with this, lol.

    • 2 years ago
  30. satellite73 Group Title
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    Float like a butterfly, sting like a bee

    • 2 years ago
  31. satellite73 Group Title
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    His hands can't hit what his eyes can't see.

    • 2 years ago
  32. lgbasallote Group Title
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    he beat muhammad ali....

    • 2 years ago
  33. GOODMAN Group Title
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    Hahaha, thats nice.

    • 2 years ago
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