Two Entangled Fermions Each Have Equal Probabilities of Being in One

question 2

Multiple Choice

Two entangled fermions each have equal probabilities of being in one of two states (state 1 or state 2) .The fermions are separated so that no forces act between them.One of the fermions is then studied and found to be in state 1.What is the probability that,when studied,the second particle will also be found in state 1?

• A) 0%
• B) 33%
• C) 50%
• D) 67%
• E) 100%