Solution to 9.3.33 (f)

[vdaras]

I think there is an error in the last part of the solution, $N(C)$ is equal to $26$, not $17$. I believe $17$ is the answer, which also can be discerned by the Venn diagram ($17$ is the number of the area of C excluding H and D).

Otherwise, thanks for your amazing work! Helped me immensely with my discrete math self-study.

[spamegg1]

Fixed in #21