Three science classes: A, B and C take an Biology test.The average sco – McqOptions

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1.	Three science classes: A, B and C take an Biology test.The average score in class A is 84.The average score in class B is 77.The average score in class C is 86.The average score of all students in class A and B is 80.The average score of all students in class B and C is 82.What is the average for all the three classes?
A.	83
B.	81.5
C.	81
D.	82.3
Answer» E.

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