statistics
posted by cebile .
Suppose you sample randomly, without replacement, a number between 1 and 999999, all outcomes have the same probability of being selected.What is the probability that the digits of the number selected add up to 23

statistics 
PsyDAG
None under 100 will = 23
995 = 9 + 9 + 5 = 23
599 = 9 + 9 + 5 = 23
959 = 9 + 9 + 5 = 23
869
779
788
Do you have a formula you can use? I don't.
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