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An alloy of 200 gm is to contain zinc an...

An alloy of 200 gm is to contain zinc and coper in the ratio of `5 :3` . What quantity of coper to be further added in so as to make the ratio `3:5` ?

A

a) `133(1)/(3)` gm

B

b) `(1)/(120)`gm

C

c) 72 gm

D

d) 66 gm

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