Question

please help me guys ​

Answer 1

Step-by-step explanation:

I hope this helps you

thank u

Answer 2

Answer:

11.D

12.D

13.B

14.D

15.C

16.B

17.C

18.A

Step-by-step explanation:

11.

A = { 1,2}

=> n (A ) = 2

B = { 3,4,5,6}

=> n (B) = 4

n(A)+n(B) = 2+4 = 6

12.

The symbol => means Implies

13.

A = Phi = {}

B = phi = {}

AUB = { } U { } = { }

AUB = phi = { }

14.

AUB = BUA is called Commutative law in sets uner union .

15. Null set = Void set = Empty set = { }

Number of elements in the empty set = 0

=> Cardinal number of null set is zero (0)

16. If AUB = B then B is the super set and A is the sub set of B

17. A = { 1,2,3,4}

B = {2,4,6,8}

A-B = {1,2,3,4} - { 2,4,6,8}

=> A-B = { 1,3}

18. n(AUB) = 8

n(A) = 6

n(B) = 4

We know that

n(AnB) = n(A)+n(B)-n(AUB)

=> n(AnB) = 6+4-8

=>n(AnB) = 10-8

=> n(AnB) = 2

or n(AUB)+n(AnB) = n(A)+n(B)

=> 8+ n(AnB) = 6+4

=> 8+ n(AnB) =10

=> n(AnB) = 10-8

=> n(AnB) = 2

Therefore, n(AnB) = 2