[填空题]
Two bags of marbles contain green and orange marbles. Bn/e ds* s afr,,e52iicag A contains 7 green mjlxb :( cj 67qc*y,ra38lhwlcarbles and 5 orange marbles, while Bag B contains 3 green marblesqajrcywhx l,6lc*3 : l (cb78j 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.
