let a, b, and c be sets in a universal set u. we are given n(u) = 75, n(a) = 39, n(b) = 43, n(c) = 43, n(a ∩ b) = 27, n(a ∩ c) = 21, n(b ∩ c) = 28, n(a ∩ b ∩ cc) = 12. find the following values.
(a) n(ac ∩ b ∩ c)
b) n(a ∩ bc ∩ cc)?

a.

which means

Similarly,

Then

b.

Note that .

By the inclusion-exclusion principle,

and , so

Then

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4