A polymer sample is made of 30% molecules of molecular mass 20,000, 40 – InterviewSolution

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1.	A polymer sample is made of 30% molecules of molecular mass 20,000, 40% of molecular mass 30,000 and rest of mass 60,000 . The barM_n is :
Answer» `36,0000` `36,000` `46,000` `50,000` ANSWER :B

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