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### Replies to This Discussion

According to Demorgan’s law

~ (p Ù q) º

~ p Ù q

~ p Ù ~ q

~ p Ú ~ q

p Ù ~ q

An argument is invalid if the conclusion is false when all the premises are ......

False

True

If is a subset of universal set U, then

f

A

U

For the two sets A and B, A Ç B is a ---------of A.

Super set

Subset

Complement set

If A and B are two sets such that A Ç B= A È B then .....................

A and B are disjoint sets

A and B are super sets

A and B are equal sets

Order of elements in a set does not matter

True

False

If A = {1, 2 ,  3} and B = {{1 ,2},3} then A - B = ……..

{3 }

{ }

{1, 2, 3 , {1 ,2}}

{1 , 2}

Which of the relation defines a function from X = {2,4,5} to Y={1,2,4,6}.

R1 = {(2,4), (4,1)}

R2 = {(2,4), (4,1), (4,2), (5,6)}

R3 = {(2,4), (4,1), (5,6)}

R1 and  R2

R1

R3

R2 and R3

If a relation is given by R = {(0,1),(1,2),(3,4)}then Range of R is

{0,1,3}

{1,2,3}

{2,3,4}

{1,2,4}

If R and S are reflexive then R Ç S is ...........

Reflexive

Transitive

Symmetric

Suppose A is a set with m elements and B is a set with n elements.

How many functions are there from A to B?

M.n

.n m

Question = Write an Excel syntax to add 60, 33, 6, 2, 91, 57 and divide the sum by 6.

Question =The price of an item is increased from \$ 8.00 to \$10.00. What percent of the original price is increased?

Question=A relation R on the set of Natural numbers N is defined as:

For all  , a R b  iff   is odd.

Show that R is symmetric.

Question =

If

Initial value = 120

Final Value = 200

Increase = 80

Then the Percentage change...................

30%

22.5%

40%