Q. The state > of a quantum mechanical system, in a certain basis, is represented by the column vector 10 >= il 1 The operator A corresponding to a dynamical variable A, is given, in the same basis, by the matrix A= 1 1 1 1 2 1 1 1 2 If, now, a measurement of the variableA is made on the system in the state 10 >, then what is the probability that the result will be +1?