To produce an old photograph, a photographer charges x dollars to make a negative 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
A. 3
B. 3.5
C. 4
D. 4.5
E. None of these
সঠিক উত্তরঃ
E.
None of these
Explanation:
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