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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?

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? Correct Answer 82.3

Given statement:

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 for all three classes is 84 + 77 + 86 divide by 3 = 82.3

Hence 82.3 is the correct answer.

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