Question 1179093
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(a)  These numbers are all 4-digit numbers from 1000 to 1999, inclusive.

    
     The number of such numbers is  1000.      <U>ANSWER</U>
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Regarding part &nbsp;(b), &nbsp;it is &nbsp;UNCLEAR &nbsp;what restrictions do you mean in this case.



Do not place two questions in one post, &nbsp;since doing it, &nbsp;you &nbsp;DISMISS &nbsp;YOURSELVE.