Question 129357: Given the digits 1, 3, 6, 9, find the probability that a four digit number formed by using each of them only once is divisible by 7.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Given the digits 1, 3, 6, 9, find the probability that a four digit number formed by using each of them only once is divisible by 7.
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That is a lot of numbers: 4^4 = 256
What criteria are you using for divisibility by 7?
Cheers,
Stan H.
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