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1. Given that
A =
{1, 2, 6, 9, 10}
B =
{2, 4, 6, 8)
C =
{1, 3, 5, 9}
D =
{ }
E =
{0, 1, 2, 8, 9, 10}
U =
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
Find:
a) (A’ Ç B’)
Ç (C’
È
D’)’
Solution
b) (C’ Ç
D’)’ D (A È E’)’
Solution
c) (B’ È D)
– (A Ç E’)
Solution
d) (A’ - B’) È (C’
- D’)’
Solution
e) [(C’ Ç
D’)’ - (A D
E’)’]’
Solution
2. In a
chemistry class with 53 students,
20
students used chemical A
19
students used chemical B
31
students used chemical C
12
students used both chemicals A and B
11
students used both chemicals B and C
10
Students used both chemicals A and C
7
students used all the three chemicals A, B, C
a) How many students used both chemicals A and
B, but not C?
b) How many students used both chemicals B and C?
c) How many students used at least 2 chemicals?
d) How many students used only 1 chemical?
e) How many students did not use any of the
chemicals?
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