How to display average in C++? -

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in c++ class, part of project have "compute student's current overall average , display it. midterm counts 20%, project average counts 40%, , homework average counts 15% "your current average xx%". there no numeric grades given calculate average in assignment percentages. have factor in these % average , if how do that. i'm beginner. here code have done part of project.

average = ( _midtermgrade + _projectaverage + _homeworkaverage / 3); cout << "your currentaverage is" << average <<endl;

to compute weighted average, sum each score multiplied weight , divide total total weight.

for example:

average = ((_midtermgrade * 20 + _projectaverage * 40 + _homeworkaverage * 15)     / (20 + 40 + 15)); cout << "your currentaverage is" << average <<endl;

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