The cost of four dozen proof machine ribbons and five dozen
accouting machine ribbons was Rs.160/-. If one dozen
accounting machine ribbons cost Rs.20/-, what is the cost of
a dozen proof machine ribbons?
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Answer Posted / karthick.m
5 dozen *20 =100
so160-100=60
60 /4 = 15 per dozen
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f(f(x))=81 THEN VALUE OF X=
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f(X)= 2X-1 + f(X-1) if X is not equal to zeroandiff(X=0)=0, If f(f(X))=81 then the value of X=?
