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Two containers of equal volume contain the same gas at pressure `P_(1)` and `P_(2)` and absolute temperature `T_(1)` and `T_(2)`, respectively. On joining the vessels, the gas reaches a common pressure `P` and common temperature `T`. The ratio `P//T` is equal to

A

`(P_(1))/(T_(1)) + P_(2)/T_(2)`

B

`1/2[p_(1)/T_(1)+P_(2)/T_(2)]`

C

`(p_(1)T_(2)+p_(2)T_(2))/(T_(1) + T_(2))`

D

`(p_(1)T_(2)-p_(2)T_(2))/(T_(1) - T_(2))`

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