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Let ast be a binaray operation deifned o...

Let `ast` be a binaray operation deifned on R by `aastb= (a+b)/(4)forall` a, b `epsilonR` then the operation `ast` is

A

Associative but not commutative

B

Commutative and Associative

C

Neither Associative nor Commutative

D

Commutative but not Associative

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The correct Answer is:
D
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