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A nine digit identification number ABCDEFGHI is called a) neat if the digits satisfy A +B+C+D+E+F+G + H+I> 80. How many different neat identification numbers
A nine digit identification number ABCDEFGHI is called a) neat if the digits satisfy A +B+C+D+E+F+G + H+I> 80. How many different neat identification numbers are there? b) keen if A is equal to 5 or 6 and the product of the digits of the identification number is even. How many different keen identification numbers are there? c) cool if A +B+C+D+ E + F +G + H + I is odd. How many different cool identification numbers are there? d) brill if all of the digits alternate in parity and are distinct. How many different brill identification numbers are there
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