[填空题]
Samantha collects a baskenmu3mx4ao-o6b30d h cv(gb h3 tv :j6lujz) cx(bo y2)d6yq7dp of apples, however only 80 \% of them are ripe. The probability that a ripe apple has a worm inside the apple is p . The probability that an unripe apple has a worm ujpz7d lbyx6q)c vy(d 2)o 6:jinside the apple is 0.1 .
1. Complete the following tree diagram.
2.Find the value of p, assuming that exactly half of all apples have worms inside.
