The average score of class X is 83. The average score of class Y is 76 – McqOptions

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1.	The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79. The average score of class Y and Z is 81. The average score of class X, Y and Z?
A.	81.5
B.	80.5
C.	79
D.	78
Answer» B. 80.5

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