Question 1191853
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The left most slot (thousands digit) can only be a 2 if we want the number between 2000 and 3000.


The set {0,1,2,3,4,5,6,7} is reduced to {0,1,3,4,5,6,7}
The original set had 8 items in it and the new reduced set has 7 items in it.


For the second slot, there are 7 choices to pick from (pick anything in that reduced set).


Then the third slot has 7-1 = 6 items to pick from if we aren't allowed to repeat digits.


Lastly, the final slot has 6-1 = 5 items to pick from.


Multiply those values: 7*6*5 = 42*5 = 210


Answer: <font color=red>210</font>
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