Aptitude Question ID : 93809

If x * y = x^{2} + y^{2} - xy , then the value of 9 * 11 is
[A]121
[B]93
[C]113
[D]103

103
Given,
x*y = x^{2}+y^{2}-xy
=> 9*11 = 9^{2}+11^{2}-9\times 11
=> 81+121-99
=> 202-99 = 103
Hence option [D] is the right answer.

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