Question about conditional probability. Can someone help me ? Repulsion. The event A is said to be repelled by the event B is P(A|B) < P(A), and to be attracted by B P(A|B) > P(A). (a) Show that if B attracts A, then A attracts B, and ~B repels A. (b) If A attracts B, and B attarcts C, does A attract C? (c) Explain this, throught ratio idea: P(A|B) > P(A) => P(B|A) > P(B).