how many numbers can be formed between 100 to 1000 such that each digit is consisting of 2 or 9

Asked by ritamkumar | 17th Oct, 2009, 05:51: AM

Expert Answer:

numbers  between 100 to 1000 such that each digit is either  2 or 9   are all 3 digt numbers

Now  for three digit numbers   Hundreds Tens    Ones

                                                           2                 2          2

So 8 numbers.

Answered by  | 21st Oct, 2009, 12:46: PM

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