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anonymous
 one year ago
A phone number contains 7 digits. How many different numbers can be made using the digits 0–9 if the first digit is not 0 and none of the digits can be repeated?
a. 362,880
b. 3,780
c. 24
anonymous
 one year ago
A phone number contains 7 digits. How many different numbers can be made using the digits 0–9 if the first digit is not 0 and none of the digits can be repeated? a. 362,880 b. 3,780 c. 24

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0beautiful combinations and permutations question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how does that work it's not one of my answers?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if the first digit is not zero, then that leaves 9 possible numbers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how do i calculate this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.09 in the first combination

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0correctly permutation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1432926939710:dw giving 362, 880 posssibilities

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry that should have read 09

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what is the answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0think of it as boxes, the first one you have 9 choices (19)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the second one you have 8 choices, becuase one has already been selected

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now according to the fundamental principle of counting, the optios are 9 x 8 x 7 x 6 etc

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you can check with others if you like @Thesmartone

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im sorry the answers were, a. 10 × 96 b. 9 × 107 c. 9 × 106 d. 107
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