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Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Asap! i need this done today and i really don’t understand it. some one ! will mark

Systems of linear equation problem. with the wind a cyclist rode 24 miles in three hours. she returned in twelve hours against the wind. find the rate of the cyclist without wind and the rate of the wind.