ok so,
a bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random one marbles drawn and replaced. then the second is drawn
1. what is the probability of selecting a purple marble and then a white marble?
2. what is the probability of selecting two white marbles?
3. is there a greater chance of selecting two white marbles in row or two purple marbles in row?

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i really need help please i dont understand

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