SOLUTION: How many four-digit numbers can be formed under each condition? (a) The leading digit cannot be 0 and the number must be less than 2000. (b) The leading digit cannot be 0 and

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Question 1179093: How many four-digit numbers can be formed under each condition?
(a) The leading digit cannot be 0 and the number must be less than 2000.
(b) The leading digit cannot be 0 and the number must be odd.
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.

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

    
     The number of such numbers is  1000.      ANSWER


Regarding part  (b),  it is  UNCLEAR  what restrictions do you mean in this case.


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