I just want to know the algebriac method, I know the easy way but I am not sure these are correct.
The Binary system is udes for computer programming. A binary number consits of a sting of digits that are eigther 0s or 1s.
a) If a string of Binary code is 5 digits long, how many binary numbers are possible if the first digit is 1.
The answer I have is 16 which I got from 1*2*2*2*2 but I would like to know the algebriac method for this question as I am not sure this is correct.
b) How many different binary numbers can be represented by a string of binary code with 5 digits if the first digit is 1 and the last 2 are 0s?
I have the answer 4 which I obtained from 1*2*2*1*1 but I would like to kknow the algebraic method as I am not sure this is correct.
2006-12-03
07:56:46
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1 answers
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asked by
gg
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Science & Mathematics
➔ Mathematics