39- The ratio of copper sind sinc in an alloy is - 9- 5 - - If the weight of zin- in the alloy le - 9-5 mathrm - gm - - then welpht of copper in it -a- - 17-2 mathrm - gm - - -c- - 17-5 mathrm - gm - - o- - 17-1 mathrm - gm - - -d- - 17-4 mathrm - gm - -

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39. The ratio of copper sind sinc in an alloy is \( 9: 5 . \) If the weight of zin. in the alloy le \( 9.5 \mathrm { gm } \) then welpht of copper in it (a) \( 17.2 \mathrm { gm } \) (c) \( 17.5 \mathrm { gm } \) o) \( 17.1 \mathrm { gm } \) (d) \( 17.4 \mathrm { gm } \)