Answer:
39
Step-by-step explanation:
detailed explanation showed in the diagram above
In a tangent segment, no part of it is in the interior of the circle. with a secant, there is a part in the interior called the chord. hope it helps
if you need help with anything else just ask me
10.7%
possibility to get a blue marker : 4/15
possibility to get a green marker: 6/15
possibility to get a blue then a green: 24/225
= 10.666666%
= 10.7%

Hope you could get an idea from here.
Doubt clarification - use comment section.
B. cause 222/30,000 you divide them both by 5 and you get 37/5000