Python "list index out of range error"

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I have written some simple Python code that should select the second element of each list within the main list and provide the user with a sum of all of these values. It should also multiply the second and third elements of each list within the main list and then sum these values.

However, when I attempt to run this code I am confronted with a "list index out of range" error.

How could I avoid this? Thanks

usa_univs = [ ['California Institute of Technology',2175,37704],
          ['Harvard',19627,39849],
          ['Massachusetts Institute of Technology',10566,40732],
          ['Princeton',7802,37000],
          ['Rice',5879,35551],
          ['Stanford',19535,40569],
          ['Yale',11701,40500]  ]

def total_enrollment(usa_univs):
    a = 0
    c = (len(usa_univs)) -1
    while c > 0:
        a = a + ([c][1])           
        b = b + (([c][1])*([c][2]))
        c = c - 1 
    print (a,b)


print total_enrollment(usa_univs)

asked 1 min ago

Kimon

1

Python "list index out of range error"