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Question
Number of rectangles, which are not squares, on a chess-board
Number of rectangles, which are not squares, on a chess-board
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Solution
The correct option is A 1296
to form a rectangle we need four lines that is 2 sets of parallel lineswe can select these lines by
9C2∗9C2=1296
to form a rectangle we need four lines that is 2 sets of parallel lines
we can select these lines by
9C2∗9C2=1296
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