anonymous
  • anonymous
How many 7 digit phone numbers can be formed if the first digit cannot be 0 or 1?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
well, let's write out each posibility for each digit and then multiply
anonymous
  • anonymous
I was told to use the Counting Principle
anonymous
  • anonymous
first one can't be 0 or 1 , so we got only 8 possibilities

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More answers

anonymous
  • anonymous
8*10*10*10*10*10*10
anonymous
  • anonymous
the other digits have 10 possibilties so we multiplies them all
anonymous
  • anonymous
Okay, so we delete 2 outta the 10 possibliity.
anonymous
  • anonymous
like Ryan did above
lgbasallote
  • lgbasallote
you're not planning on stalking someone are you @GOODMAN /:) he
anonymous
  • anonymous
Wait, how do we know that the others have 10 possibilities, doesnt it apply to the others as well?
lgbasallote
  • lgbasallote
jk goodie :DDD
anonymous
  • anonymous
well, only first digit can't be 0 or 1 ; other digits can be any number from 0 to 9
anonymous
  • anonymous
Ohhh, okay, got it!
anonymous
  • anonymous
I need help with one more if you dont mind..
anonymous
  • anonymous
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?
anonymous
  • anonymous
@satellite73
anonymous
  • anonymous
yes?
anonymous
  • anonymous
little help with photographer problem
anonymous
  • anonymous
ok ____, ___, ____, B G ____, ____, _____
anonymous
  • anonymous
\[6!\]
anonymous
  • anonymous
Thats it?
anonymous
  • anonymous
yep
anonymous
  • anonymous
How?
anonymous
  • anonymous
that looks right to me
agreene
  • agreene
what all of a sudden this has to be in base 10?
anonymous
  • anonymous
this might surprise you and this might amaze you
anonymous
  • anonymous
but i am going to knock out joe frazier !
anonymous
  • anonymous
Huh?
anonymous
  • anonymous
btw it is \[6!=6\times 5\times 4\times 3\times 2=720\]
anonymous
  • anonymous
Yea, i knw what factorials are, but whats is Joe Frazier got to do with this, lol.
anonymous
  • anonymous
Float like a butterfly, sting like a bee
anonymous
  • anonymous
His hands can't hit what his eyes can't see.
lgbasallote
  • lgbasallote
he beat muhammad ali....
anonymous
  • anonymous
Hahaha, thats nice.

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