Posted by unknown on .
Suppose we have a qubit in the state ψ⟩. We know that if we measure it in the standard basis, the probability of getting a 0 is 79. Now, if we instead first apply a Hadamard gate and then measure the resulting qubit Hψ⟩ in the sign basis, what is the probability of getting a +?

Physics 
helper,
7/9