Three maths classes : X, Y and Z, take a...

Three maths classes : X, Y and Z, take an algebra test. 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 and average score of class Y and Z is 81. What is the average score of classes X , Y, Z

81.5

80.5

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MAHENDRA-AVERAGE-EXERCISE

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The average salary per month of 30 employees in a company is Rs. 4000....
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The questions given below consists of a question followed by three sta...
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The questions given below consists of a question followed by three sta...
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The average marks of a student in 10 papers are 80. If the heighest an...
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Three maths classes : X, Y and Z, take an algebra test. The average sc...
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In a school with 600 students, the average age of the boys is 12 years...
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