Brainteaser iconBrainteaser - Checking Corners

Checking Corners
Probability
SIG
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xx x x×x xxxxx, xxxx x xxxxxxxx xxxxxx xxxxxxxxx xx xxxxxx xxxx xxx xxxxxx x×x. xxxx xxxx xxx xxxxxxx xxxxx xxx xxxxxx xxxxxxxxxx xx-xxxx xx xx-xxxxx xxxx xxxxx xxxxxxxxxxx; xx xxxx xxx xx xxxxx xxxxx xx xx-xxxxx, xx xxxxx xxxx xxxx. xxx xxxxxxx xxxxx xxxx xxxxxxxx xxx xxx xxx. xxxx xx xxx xxxxxxxxxxx xxx xxxxx xxxxxx xx xxx xxx-xxxx xx xxx-xxxxx xxxxxx?

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