# Quiz 29: Set Theory and Enumeration

Business

Free

Multiple Choice

D

Q 2Q 2

Which of the following options is NOT a subset of A, if A = {a,b,c,d,e}?
A) B = {b,c,e}
B) C = {a,c,d}
C) D = {f, g}
D) E = {a,d,e}

Free

Multiple Choice

C

Free

Multiple Choice

C

Free

Multiple Choice

Q 5Q 5

A firm in Nigeria has 5 factories (F = {1,2,3,4,5}) 3 are in Lagos (L = {1,4,5) and 2 are in Abuja (A = {2,3}). Which of the formulae below is correct?
A) F = L∩A
B) F = L⋃A
C) F = L'
D) F = A'

Free

Multiple Choice

Q 6Q 6

A car company makes cars in 3 colours (C = {red, green, black}) and in 2 styles (S = {3-door, 5-door}).The 3-door model is the only car available in red. Which of the formulae represent red, 3-door cars?
A) C'
B) S'
C) C⋃S
D) C∩S

Free

Multiple Choice

Q 7Q 7

Which of the following statements about sets X and Y is correct if n[X∩Y] = 0?
A) Neither set X nor set Y have any elements in them
B) There are no elements that are in both set X and set Y
C) All elements are in set X and set Y
D) All elements are in set X or set Y

Free

Multiple Choice

Q 8Q 8

A software company in Athens, Greece employs 24 staff, 7 of the 14 members of staff that speak Arabic are employed in sales. 9 members of the sales team do not speak Arabic. How many people in the company neither speak Arabic nor work in sales?
A) 1
B) 2
C) 3
D) 4

Free

Multiple Choice

Q 9Q 9

Calculate b if a = 3, ab = 5, $ = 6 and there are a total of 22 elements in A and B together.
A) 4
B) 5
C) 6
D) 7

Free

Multiple Choice

Q 10Q 10

A clothing manufacturer in Bangladesh classifies its products in 3 ways: C - for cotton items; T - for t-shirts; and G - for green items. Which of the following formulae calculates the number of cotton items of any colour but that are not t-shirts?
A) c + cg
B) c + cg + g
C) c + cg + cgt
D) c + cg - t

Free

Multiple Choice