1964 AMC 12 Question 22 - thichhoctoan.com

Question 22

Given parallelogram $ABCD$ with $E$ the midpoint of diagonal $BD.$ Point $E$ is connected to a point $F$ in $DA$ so that $DF=\frac13DA.$ What is the ratio of the area of triangle $DFE$ to the area of quadrilateral $ABEF?$

$1:2$
$1:3$
$1:5$
$1:6$
$1:7$