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Why does the answers to the problem found in the referenced pdf, differ from my calculation below? I am trying to understand the math from this pdf from an online tutorial I am reading and my own math does not give the same result: Can someone help derive their answer or confirm mine?

http://www.cs.columbia.edu/4761/assignments/assignment1/reference1.pdf On page 13, I am trying to figure out how the weighted values are determined:

For example C_LL: 2.33 means the construct is [L_1 (L_2a L_2b) L] and the center block is being counted as 1/3 for each so we get 4*(1/3) + 1 = 2.33 but the L_2a to L_2b i.e., the inside the block is not counted that should make it 2.66 right?

For C_LV: here there is obviously 4*1/3+1 and now the internal would be 2*1/3 which sums to 3 not 3.33. And now the internal one is counted.

I am confused. Any help?

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