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Moderator
Combination
How many possible combinations are possible in a three digit with numbers 0-9
NOTE : [This question was asked by kimberly]
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Expert Member
Re: Combination
Answer is 9 * 10 * 10 = 900
First digit can not be 0 and it can be any number between 1 to 9. it can be arranged in 9 diff ways.
Second degit can have 0. There can have any number between 0-9 -- 10 diff ways.
For the third digit it is similar as 2 nd digit.
Hence there are 900 diff combinations of 3 digit number are avilable.
But for this question we don't have to apply the above standard method of solving this kind of problem. Because this just needs the number of numbers between 100 to 999. It is obviously 900.
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