11th Class
Mathematics
Sample Paper
Mathematics Olympiad - Sample Paper-10
question_answer
Three math?s 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 s 79 and average score of class V and Z is 81. What is the average score of classes X, Y and Z?