Solution:

We can deduce the following information from the question:

The total number of determinants of second order in which the element is or is not

Now, we have the value of determinants is positive in following cases:

Required probability

Solution:

We can deduce the following information from the question:

The total number of determinants of second order in which the element is or is not

Now, we have the value of determinants is positive in following cases:

Required probability