Data analysis for the college data in colleges.txt to compare graduation rates
between public and private universities.
Variables: type = university type (public 1, private 2)
phd = percentage of faculty with phd
stud_fac = student/faculty ratio
Assume that there are a coins of value x and b coins of value y.
Total_value = ax + by
Check if Total_value is odd, if odd return false
for i from 0 to a:
for j from 0 to b:
check if i*x + j*y = Total_value / 2, if yes return true
/ Varad Karmarkar
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