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Exam. 15.01.2017) (IInd Sitting)43. Three Science classes A, B andC take a Life Science test. Theaverage score of class A is 83.The average score of class B is76. The average score of class Cis 85. The average score of classA and B is 79 and average scoreof class B and C is 81. Then theaverage score of classes A, B andC is

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