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How many odd numbers are there from the integers 700 to 999

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 [#permalink] New post 06 Oct 2005, 17:00
nice thanks for the shortcuts guys . very helpful :-D
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 [#permalink] New post 06 Oct 2005, 21:50
Solution offered is -

Quote:
for X we have 3 choices...7, 8, 9

for Y we have (remember different numbers, so we cant use 7,8,9) 6 numbers..

for Z we have to have an odd digit, so 5 of them

so 3*6*5 +1 (since its says inclusive)=91.....


My Question is, will the above reasoning include the number, say 785 as it says Y can take only 6 values (1 thru 6)!?

Am I missing something? Please help.
  [#permalink] 06 Oct 2005, 21:50
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