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Three liquids with masses `m_(1),m_(2),m_(3)` are thoroughly mixed. If their specific heats are `c_(1),c_(2),c_(3)` and their temperatures `T_(1),T_(2),T_(3)` respectively, then the temperature of the mixture is

A

`(s_(1) theta_(1)+s_(2)theta_(2)+s_(3)theta_(3))/(m_(1)s_(1)+m_(2)s_(2)+m_(3)s_(3))`

B

`(m_(1)s_(1)theta_(1)+m_(2)s_(2)theta_(2)+m_(3)s_(3)theta_(3))/(m_(1)s_(1)+m_(2)s_(2)+m_(3)s_(3))`

C

`(m_(1)theta_(1)+m_(2)theta_(2)+m_(3)theta_(3))/(s_(1)theta_(1)+s_(2)theta_(2)+s_(3)theta_(3))`

D

`(m_(1)theta_(1)+m_(2)theta_(2)+m_(3)theta_(3))/(s_(1)theta_(1)+s_(2)theta_(2)+s_(3)theta_(3))`

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