a) 20
b) 16
c) 25
d) 30
Answer: b
Explanation:
$$\eqalign{
& {\text{C}}{\text{.P}}{\text{.}}\,{\text{of first chair}} \cr
& = \frac{{100}}{{125}} \times 120 = {\text{Rs}}{\text{.}}\,96 \cr
& {\text{C}}{\text{.P}}{\text{.}}\,\,{\text{of}}\,{\text{second}}\,{\text{chair}} \cr
& = \frac{{100}}{{75}} \times 120 = {\text{Rs}}{\text{.}}\,160 \cr
& {\text{Loss}} = 160 + 96 – 240 \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs}}{\text{.}}\,16 \cr} $$ .
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