If S is a set with 10 elements and \A=\{(x,y):x,y∊S,x\neqy\}, then the number of elements in A is

KEAM 2018 Math Paper

Question : 109 of 120

Marks: +1, -0

If S is a set with 10 elements and A={(x,y):x,y∊S,x≠y}, then the number of elements in A is

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