[填空题]
Two bags of marbles contiy6voruly / /c96n jb)ak q s;,* js, whk/y* i:m,lx3coabu+adin green and orange marbles. Bag A contains 7 green marbles and 5 orange marbles, while Bag B contains 3 green marbles *b,ss, xhkwk,:ol /iu +m3jy*d;acaq and 9 orange marbles.
One marble is selected from Bag A and then Bag B.
1. Determine the probability of selecting two marbles of the same colour.
Both marbles from part (a) are put back into the bags they came from. This time, an unbiased coin is flipped to determine which bag to select a single marble from. If the coin flips heads, a marble is selected from Bag A. If the coin flips tails, a marble is selected from Bag B.≈
2. Determine the probability of flipping tails and then selecting a green marble.
