Teaching DSSSB TGT Mock Test 2025 Mathematics Mathematics Group theory

Let X be a set, f: X → X and g: X → X be two functions and composite function (f ∘ g) : X → X is defined by (f ∘ g)(x) = f(g(x)). then which of the following is not true?

1
Commutative
2
Associative
3
identity
4
None of these
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