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weqwewe [10]
3 years ago
13

How many 4-digit combinations of numbers are there such that no digits repeat and all of the digits are from 0 through 9?

Mathematics
1 answer:
SashulF [63]3 years ago
3 0
10\cdot9\cdot8\cdot7
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liraira [26]

Answer:

1 3/5 = 8/5

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Step-by-step explanation:

make an equality:

x/(8/5)=2/100

it kinds looks weird on here but write it out on paper

then cross multiply:

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100x=16/5

now divide each side by 100:

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same for the second one:

make an equality:

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STEP 2:

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STEP 3:

An = a+(n-1)d

ANS:

6 0
2 years ago
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