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Byju's Answer
Standard X
Mathematics
Probability
If nine squar...
Question
If nine squares are chosen at random on a chess board, The probability that they form a square of size
3
×
3
is
=
6
k
64
C
9
.Find
k
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Solution
S
:
Number of ways of selecting
9
square from
64
is
64
C
9
E
:
Number of ways of
3
×
3
square
=
36
∴
Required probability
=
364
64
C
9
⇒
k
=
6
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