Question

Cho P(A) = \(\dfrac{2}{5}\); P(B | A) = \(\dfrac{1}{3}\); P(B | \(\overline{A}\)) = \(\dfrac{1}{4}\).

Giá trị P(AB) là:

A. \(\dfrac{2}{5}\).                       B. \(\dfrac{3}{16}\).                      C. \(\dfrac{1}{5}\).                     D. \(\dfrac{4}{15}\).

Answer 1

\(P\left( {AB} \right) = P\left( A \right).P\left( {B|A} \right) = \frac{2}{5}.\frac{1}{3} = \frac{2}{{15}}\)

Chọn A