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The average weight of 12 articles is 18 ...

The average weight of 12 articles is 18 kg. Addition of another new article reduces the average weight by 500g. What is the weight of the new article?
12 वस्तुओं का औसत वज़न 18 किलो ग्राम है | एक अन्य नयी वस्तु को शामिल करने से औसत वज़न 500 ग्राम कम हो जाता है | नयी वस्तु का वज़न ज्ञात करें |

A

11.5 kg

B

15.0 kg

C

11.0 kg

D

10.1 kg

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