11dekh
there will be total cases of 24as 0,1 can be filled at 4 locations
and now u have to make determinants to check its value
u can cross check that there will be only 3 cases possible i.e
|1 0|
|1 1|
|1 0|
|0 1|
|1 1|
|0 1|
If each element of a second order determinant is either zero or one, what is the probability that the value of the determinant is positive? (Assume that the individual enteries of the determinant are chosen independently, each value being assumed with probability 1/2).
ANS:-3/16
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2 Answers
24http://targetiit.com/iit_jee_forum/posts/ncert_probability_3589.html
11