a game consists of randomly choosing a bag (labelled 1,2 or 3) out of a choice of 100, and then again randomly, picking a ball (red or black) from it. each bag has the same number of total balls (10)

Answer:
see below
Step-by-step explanation:
a- 0.2
as 0.35 + 0.45=0.8
1-0.8=0.2
c. 112
b. im not sure what b is but if i work it out ill add it as an additional comment :)