a) 0.025
b) 0.0025
c) 0.25
d) 0.000025
Answer: a
Explanation:
$$\eqalign{
& 1\% \,{\text{of}}\,1\% \,{\text{of}}\,25\% \,1000 \cr
& = 1\% \,{\text{of}}\,1\% \,{\text{of}}\,\, {\frac{{ {25 \times 1000} }}{{100}}} \cr
& = 1\% \,{\text{of}}\,1\% \,{\text{of}}\,250 \cr
& = 1\% \,{\text{of}}\,\, {\frac{{ {1 \times 200} }}{{100}}} \cr
& = 1\% \,{\text{of}}\,\,2.5 \cr
& = \frac{{2.5}}{{100}} \cr
& = 0.025 \cr} $$
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