Mr. Bakhtiar works in the procurement department of a library. Under a new purchase policy, he increased the total number of books in the library by 20%. But soon afterwards, as part of the library cleaning process, 10% of the total library book stock is disposed of. What is the net change over the initial number of books in the library ?
A. increased of 10%
B. increased of 30%
C. decreased of 8%
D. none of these
সঠিক উত্তরঃ
D.
none of these
Explanation:
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