Question 207503
In a college, some courses contribute more towards an overall GPA than other courses.
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For example, a science class is worth 4 points; mathematics is worth 3 points;
 history is worth 2 points; and English is worth 3 points.
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 The values of the grade letters are as follows, A= 4, B=3, C=2, D=1, F=0.
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 What is the GPA of a student who made a “C” in Trigonometry, a “B” in American
 History, an “A” in Botany, and a “B” in Microbiology? 
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Let's do it this way
Trig(2) + Hist(3) + Bot(4) + Micro(3)
{{{(3(2) + 2(3) + 4(4) + 4(3))/(3+2+4+4)}}} = {{{(6 + 6 + 16 + 12)/13}}} = {{{40/13}}} = 3.077 ~ 3.08