EM-2901

Tree diagrams

E Math · Secondary 4 · Hard · Tree diagrams

Bag X contains 4 green and 2 yellow balls. Bag Y initially contains

y

green and 3 yellow balls. One ball is drawn at random from Bag X and placed into Bag Y. Then a ball is drawn at random from Bag Y. The probability of drawing a green ball from Bag X and then a green ball from Bag Y is

\dfrac{1}{4}

. Find the value of

y

$0.8$
$1.2$
$2$
$4$

Loading problem…