Created
September 5, 2016 12:07
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Hackerrank Statistics Day 0: Weighted Mean
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| raw_input() | |
| m = raw_input() | |
| w = raw_input() | |
| w = [float(i) for i in w.split()] | |
| m = sum([w[int(i)] * int(j) for i, j in enumerate(m.split())]) | |
| print "%.1f" % (m / sum(w)) |
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