MathematicsBinary operationsWAEC
The operation x ∗ y = (x + y)/2 is defined on the real numbers. Which statement is true?
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Answer: A. It is commutative but not associative
x ∗ y = y ∗ x, but for example (2 ∗ 4) ∗ 6 = 4.5 while 2 ∗ (4 ∗ 6) = 3.5.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.