Q. The state|ψ > of a quantum mechanical system, in a certain basis, is represented by the column vector
![566_Untitled.png](https://secure.tutorsglobe.com/CMSImages/566_Untitled.png)
The operator Aˆ corresponding to a dynamical variable A, is given, in the same basis, by the matrix
![794_Untitled.png](https://secure.tutorsglobe.com/CMSImages/794_Untitled.png)
If, now, a measurement of the variable A is made on the system in the state |ψ >, then what is the probability that the result will be +1?