Scroll:Theory of sets >> set operations using venn diagram >> ps (4163)


Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.



 

1)  

 If n(A) = 16,n(B) = 14,n(AUB) = 27, n(A') = 16, Find n(A∩B) and n(U).

A
B
16
14
27
 

 n(A∩B) =

 n(U) =



Answer:_______________




2)  

 If n(A) = 16,n(B) = 21,n(AUB) = 23, n(A') = 20, Find n(A∩B) and n(U).

A
B
16
21
23
 

 n(A∩B) =

 n(U) =



Answer:_______________




3)  

 If n(A) = 24,n(B) = 21,n(AUB) = 29, n(A') = 15, Find n(A∩B) and n(U).

A
B
24
21
29
 

 n(A∩B) =

 n(U) =



Answer:_______________




4)  

 If n(A) = 18,n(B) = 22,n(AUB) = 21, n(A') = 13, Find n(A∩B) and n(U).

A
B
18
22
21
 

 n(A∩B) =

 n(U) =



Answer:_______________




5)  

 If n(A) = 23,n(B) = 23,n(AUB) = 22, n(A') = 19, Find n(A∩B) and n(U).

A
B
23
23
22
 

 n(A∩B) =

 n(U) =



Answer:_______________




6)  

 If n(A) = 21,n(B) = 20,n(AUB) = 28, n(A') = 11, Find n(A∩B) and n(U).

A
B
21
20
28
 

 n(A∩B) =

 n(U) =



Answer:_______________




7)  

 If n(A) = 17,n(B) = 10,n(AUB) = 20, n(A') = 13, Find n(A∩B) and n(U).

A
B
17
10
20
 

 n(A∩B) =

 n(U) =



Answer:_______________




8)  

 If n(A) = 16,n(B) = 18,n(AUB) = 28, n(A') = 11, Find n(A∩B) and n(U).

A
B
16
18
28
 

 n(A∩B) =

 n(U) =



Answer:_______________




9)  

 If n(A) = 16,n(B) = 17,n(AUB) = 21, n(A') = 18, Find n(A∩B) and n(U).

A
B
16
17
21
 

 n(A∩B) =

 n(U) =



Answer:_______________




10)  

 If n(A) = 23,n(B) = 22,n(AUB) = 24, n(A') = 15, Find n(A∩B) and n(U).

A
B
23
22
24
 

 n(A∩B) =

 n(U) =



Answer:_______________




 

1)  

 If n(A) = 16,n(B) = 14,n(AUB) = 27, n(A') = 16, Find n(A∩B) and n(U).

A
B
16
14
27
 

 n(A∩B) = Answer: 3

 n(U) = Answer: 32


SOLUTION 1 :

 n(A) = 16,

n(B) = 14,

n(AUB) = 27,

n(A") = 16

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

27 = 16 + 14 - n(A∩B)  

27 = 30 - n(A∩B)  

n(A∩B) = 30 - 27  

n(A∩B) = 3

HInt n(U) = n(A) + n(A")

n(U) = 16 + 16

 n(U) = 32



2)  

 If n(A) = 16,n(B) = 21,n(AUB) = 23, n(A') = 20, Find n(A∩B) and n(U).

A
B
16
21
23
 

 n(A∩B) = Answer: 14

 n(U) = Answer: 36


SOLUTION 1 :

 n(A) = 16,

n(B) = 21,

n(AUB) = 23,

n(A") = 20

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

23 = 16 + 21 - n(A∩B)  

23 = 37 - n(A∩B)  

n(A∩B) = 37 - 23  

n(A∩B) = 14

HInt n(U) = n(A) + n(A")

n(U) = 16 + 20

 n(U) = 36



3)  

 If n(A) = 24,n(B) = 21,n(AUB) = 29, n(A') = 15, Find n(A∩B) and n(U).

A
B
24
21
29
 

 n(A∩B) = Answer: 16

 n(U) = Answer: 39


SOLUTION 1 :

 n(A) = 24,

n(B) = 21,

n(AUB) = 29,

n(A") = 15

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

29 = 24 + 21 - n(A∩B)  

29 = 45 - n(A∩B)  

n(A∩B) = 45 - 29  

n(A∩B) = 16

HInt n(U) = n(A) + n(A")

n(U) = 24 + 15

 n(U) = 39



4)  

 If n(A) = 18,n(B) = 22,n(AUB) = 21, n(A') = 13, Find n(A∩B) and n(U).

A
B
18
22
21
 

 n(A∩B) = Answer: 19

 n(U) = Answer: 31


SOLUTION 1 :

 n(A) = 18,

n(B) = 22,

n(AUB) = 21,

n(A") = 13

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

21 = 18 + 22 - n(A∩B)  

21 = 40 - n(A∩B)  

n(A∩B) = 40 - 21  

n(A∩B) = 19

HInt n(U) = n(A) + n(A")

n(U) = 18 + 13

 n(U) = 31



5)  

 If n(A) = 23,n(B) = 23,n(AUB) = 22, n(A') = 19, Find n(A∩B) and n(U).

A
B
23
23
22
 

 n(A∩B) = Answer: 24

 n(U) = Answer: 42


SOLUTION 1 :

 n(A) = 23,

n(B) = 23,

n(AUB) = 22,

n(A") = 19

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

22 = 23 + 23 - n(A∩B)  

22 = 46 - n(A∩B)  

n(A∩B) = 46 - 22  

n(A∩B) = 24

HInt n(U) = n(A) + n(A")

n(U) = 23 + 19

 n(U) = 42



6)  

 If n(A) = 21,n(B) = 20,n(AUB) = 28, n(A') = 11, Find n(A∩B) and n(U).

A
B
21
20
28
 

 n(A∩B) = Answer: 13

 n(U) = Answer: 32


SOLUTION 1 :

 n(A) = 21,

n(B) = 20,

n(AUB) = 28,

n(A") = 11

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

28 = 21 + 20 - n(A∩B)  

28 = 41 - n(A∩B)  

n(A∩B) = 41 - 28  

n(A∩B) = 13

HInt n(U) = n(A) + n(A")

n(U) = 21 + 11

 n(U) = 32



7)  

 If n(A) = 17,n(B) = 10,n(AUB) = 20, n(A') = 13, Find n(A∩B) and n(U).

A
B
17
10
20
 

 n(A∩B) = Answer: 7

 n(U) = Answer: 30


SOLUTION 1 :

 n(A) = 17,

n(B) = 10,

n(AUB) = 20,

n(A") = 13

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

20 = 17 + 10 - n(A∩B)  

20 = 27 - n(A∩B)  

n(A∩B) = 27 - 20  

n(A∩B) = 7

HInt n(U) = n(A) + n(A")

n(U) = 17 + 13

 n(U) = 30



8)  

 If n(A) = 16,n(B) = 18,n(AUB) = 28, n(A') = 11, Find n(A∩B) and n(U).

A
B
16
18
28
 

 n(A∩B) = Answer: 6

 n(U) = Answer: 27


SOLUTION 1 :

 n(A) = 16,

n(B) = 18,

n(AUB) = 28,

n(A") = 11

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

28 = 16 + 18 - n(A∩B)  

28 = 34 - n(A∩B)  

n(A∩B) = 34 - 28  

n(A∩B) = 6

HInt n(U) = n(A) + n(A")

n(U) = 16 + 11

 n(U) = 27



9)  

 If n(A) = 16,n(B) = 17,n(AUB) = 21, n(A') = 18, Find n(A∩B) and n(U).

A
B
16
17
21
 

 n(A∩B) = Answer: 12

 n(U) = Answer: 34


SOLUTION 1 :

 n(A) = 16,

n(B) = 17,

n(AUB) = 21,

n(A") = 18

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

21 = 16 + 17 - n(A∩B)  

21 = 33 - n(A∩B)  

n(A∩B) = 33 - 21  

n(A∩B) = 12

HInt n(U) = n(A) + n(A")

n(U) = 16 + 18

 n(U) = 34



10)  

 If n(A) = 23,n(B) = 22,n(AUB) = 24, n(A') = 15, Find n(A∩B) and n(U).

A
B
23
22
24
 

 n(A∩B) = Answer: 21

 n(U) = Answer: 38


SOLUTION 1 :

 n(A) = 23,

n(B) = 22,

n(AUB) = 24,

n(A") = 15

n(A∩B) = 

 n(AUB) =  n(A) + n(B) - n(A∩B)  

24 = 23 + 22 - n(A∩B)  

24 = 45 - n(A∩B)  

n(A∩B) = 45 - 24  

n(A∩B) = 21

HInt n(U) = n(A) + n(A")

n(U) = 23 + 15

 n(U) = 38