Sets, Relations and Functions - Arithmetic Aptitude Questions and Answers

Home / Arithmetic Aptitude / Sets, Relations and Functions :: Discussion

A subset H of a group(G,*) is a group if

a,b ∈ H ⇒ a * b ∈ H

a ∈ H⇒ a-1 ∈ H

a,b ∈ H ⇒ a * b-1 ∈ H

H contains the identity element

Answer : Option C

Explanation :

a,b ∈ H ⇒ a * b-1 ∈ H

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