Question: LetS S be the universal set, where: S = { 1 , 2 , 3 , ... , 18 , 19 , 20 } S={1,2,3,...,18,19,20}

LetS

S

be the universal set, where:

S

=

{

1

,

2

,

3

,

...

,

18

,

19

,

20

}

S={1,2,3,...,18,19,20}

Let setsA

A

andB

B

be subsets ofS

S

, where:

SetA

=

{

1

,

2

,

4

,

5

,

6

,

7

,

8

,

9

,

10

,

11

,

17

,

18

}

A={1,2,4,5,6,7,8,9,10,11,17,18}

SetB

=

{

4

,

6

,

7

,

12

,

13

,

14

}

B={4,6,7,12,13,14}

SetC

=

{

4

,

7

,

8

,

9

,

11

,

13

,

19

,

20

}

C={4,7,8,9,11,13,19,20}

Find the number of elements in the set(

A

C

)

B

c

(AC)Bc

n

[

(

A

C

)

B

c

]

n[(AC)Bc]

=

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