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The prime cost of an article is three ti...

The prime cost of an article is three times the value of the raw material used. The cost of raw materials increasef in the ratio of 5 : 12 and manufacturing expenses in the ratio 4 : 5 . The article, which originally cost Rs 6, will now cost.

A

7.8

B

6.8

C

5.8

D

9.8

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