Problema Solution
1) A student obtains 6 marks less than the class average. If we double his marks it will be 40 above the average. Calculate the students marks and the average of the class.
Answer provided by our tutors
Let 'x' represent the average of the class, x>=0.
We will assume that we take into account the class average of the other students (without the students marks):
2(x - 6) = 40 + x
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click here to see the equation solved for x
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x = 52
x - 6 = 52 - 6 = 46
The student's marks are 46.
The average of the call is 52.