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How many methods are used for expressing a set?
a) 2        
b) 3                        
c) 4        
d) 5

b


a

A={1, 2, 3, 4, 5, 6, 7, 8, 9, 10} =?
a) A is a set of first ten natural number
b) A is a set of first ten whole number
c) A is a set of first ten integer
d) All of the above 

a


c

A = {1, 2, 3, 4} B= {3, 4, 5} then AB=?
a) {1, 2, 3, 4}                       
b) {1, 2, 3, 4, 5}
c) {3, 4}                                
d) None of these

b

A = {1, 2, 3, 4} B= {3, 4, 5} then AB=?
a) {1, 2, 3, 4}                       
b) {1, 2, 3, 4, 5}
c) {3, 4}                                
d) None of these

b