if j is the number of integers between 1 and 500 that are divisible by 9 and k is the number of integers between 1 and 500 that
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Combinations = n! / (n - r)! r!
In this case:
n = 4
r = 3
Combinations = 4! /(4-3)! 3! = 24/(1)(6) = 24/6 = 4
Answer:
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