Six balls numbered 1 to 6 are to be placed in six boxes numbered 1 to 6 .If the balls are to be placed at random into the boxes then the probability that
1) at least two balls are to be placed in corresponding numbered boxes
A) 191/720 b) 529/720
C) 1/720 d ) 1/604 comments
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no balls at their corresponding place=265..can u plz explain in detail??
dearrangement bhai @balu.saiteja