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A five-digit number is chosen at random from all possible five-digit numbers. Find the probability that the number is NOT divisible by every element of ( 1,2,3,4,5) 

 Oct 29, 2020
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Between 10,000 and 99,999, you have 90,000 5-digit numbers. Out of these 90,000 numbers, exactly 24,000 numbers are NOT divisible by any number in the set {1, 2, 3, 4, 5}.

 

Then, the probability is: 24,000 / 90,000 =4 / 15

 Oct 29, 2020

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