試題詳解

2. The probability that a visit to a primary care physician’s (PCP) office results in neither lab work nor referral to a specialist is 35%. Of those coming to a PCP’s office, 30% are referred to specialists and 40% require lab work.
Calculate the probability that a visit to a PCP’s office results in both lab work and referral to a specialist.
(A) 0.05
(B) 0.12
(C) 0.18
(D) 0.25
(E) 0.35