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How many 7 digit phone numbers can be formed if the first digit cannot be 0 or 1?
 2 years ago
 2 years ago
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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imranmeah91Best ResponseYou've already chosen the best response.3
well, let's write out each posibility for each digit and then multiply
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
I was told to use the Counting Principle
 2 years ago

imranmeah91Best ResponseYou've already chosen the best response.3
first one can't be 0 or 1 , so we got only 8 possibilities
 2 years ago

imranmeah91Best ResponseYou've already chosen the best response.3
the other digits have 10 possibilties so we multiplies them all
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
Okay, so we delete 2 outta the 10 possibliity.
 2 years ago

imranmeah91Best ResponseYou've already chosen the best response.3
like Ryan did above
 2 years ago

lgbasalloteBest ResponseYou've already chosen the best response.2
you're not planning on stalking someone are you @GOODMAN /:) he
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
Wait, how do we know that the others have 10 possibilities, doesnt it apply to the others as well?
 2 years ago

imranmeah91Best ResponseYou've already chosen the best response.3
well, only first digit can't be 0 or 1 ; other digits can be any number from 0 to 9
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
I need help with one more if you dont mind..
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
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

imranmeah91Best ResponseYou've already chosen the best response.3
little help with photographer problem
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
ok ____, ___, ____, B G ____, ____, _____
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
that looks right to me
 2 years ago

agreeneBest ResponseYou've already chosen the best response.0
what all of a sudden this has to be in base 10?
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
this might surprise you and this might amaze you
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
but i am going to knock out joe frazier !
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
btw it is \[6!=6\times 5\times 4\times 3\times 2=720\]
 2 years ago

GOODMANBest ResponseYou've already chosen the best response.0
Yea, i knw what factorials are, but whats is Joe Frazier got to do with this, lol.
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
Float like a butterfly, sting like a bee
 2 years ago

satellite73Best ResponseYou've already chosen the best response.0
His hands can't hit what his eyes can't see.
 2 years ago

lgbasalloteBest ResponseYou've already chosen the best response.2
he beat muhammad ali....
 2 years ago
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