Question No 1:
A retailer buys a box of a product, which nominally contains Q units. The planned selling price of each unit is £P. If both P and Q have been rounded to ± 10%, then the maximum rounding error in total revenue is
A. 10%
B. 20%
C. 21%
D. 0∙1Q x 0∙1P
Answer: C
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