Define a commutative binary operation on a set.

Define a commutative binary operation no a non-empty set A.

Define a binary operation on a set.

Define a binary operation on a set.

Define a binary operation on a set

Define an associative binary operation on a set.

Define an associative binary operation on a set.

Commutativity of binary operations

The number of commutative binary operations that can be defined on a set of 2 elements is

The number of commutative binary operations which can be defined on a set containing n elements is

The number of commutative binary operations that can be defined on a set of 2 elements is (a) 8 (b) 6 (c) 4 (d) 2