Class 9 Set(2078)

If A and B are two disjoint set, n(A) = x and n(B) = y,

What is the value of n(AUB) ?

• x - y

• x + y

• xy

• x + y -1

If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∩ B?

• {2, 3, 5, 7}

• {1, 2, 3, 5, 7, 9}

• {3, 5, 7}

• {2, 3, 5, 7, 9}

How can we define (AUB) mathematically ?

• { x:x∈A or x∈B }

• {x : x∈A and x∈B }

• {x: x∈U but x∉A}

• A – B = { x : x∈A but x∉B}

How many students do not like ski or ice skate?

• 10

• 16

• 22

• 28

If A $\subset$ B , n(A) = 25 and n(AUB) = 35 , 

What is the value of n(B) ? 

• 25

• 65

• 10

• 40

If

P = {0, 1, 2, 3, 4}, Q = {4, 6, 8}

R = {6, 12, 18}, Then what is (P ∩ Q) ∪ (Q ∩ R)?

• {1, 2, 3, 4, 6, 8}

• {4,6}

• {4)

• {4,6,8}

What statement does the shaded region represent?

• AUBUC

• AUB $\cap$ C

• AUB - C

• A U B

Find n(A) for the set:

A = {14, 16, 18, 20, 22, 24}

• 5

• 24

• 14

• 6

How many students took part in survey ?

• 32

• 47

• 53

• 56

If n(U) = 100 and n(AUB) =71, what is the value of n(AUB)^c ?

• 19

• 21

• 171

• 29