Question 86905

I need some help oh this word problem:

In order to pass a college class it is necessary to obtain an average of 70% correct on three tests of 100 points each and on one final exam of 200 points. If a students scores 81, 62, 63 on the tests, what is the minimum score on the final exam that the student can receive and still pass the course? 
<pre>
The student needs 144 out of 200 points on the final exam, or a minimum score of {{{highlight_green(highlight_green(72))}}}% to pass with a 70% average.
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