SOLUTION: A bag contains 7 lavender marbles, 11 turquoise marbles and 5 rainbow marbles. What is the chance of drawing a rainbow marble? If a rainbow marble is drawn then placed back into th
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-> SOLUTION: A bag contains 7 lavender marbles, 11 turquoise marbles and 5 rainbow marbles. What is the chance of drawing a rainbow marble? If a rainbow marble is drawn then placed back into th
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Question 249686: A bag contains 7 lavender marbles, 11 turquoise marbles and 5 rainbow marbles. What is the chance of drawing a rainbow marble? If a rainbow marble is drawn then placed back into the bag, and a second marble is drawn, what is the probability of drawing a lavender marble? Thanks! Found 2 solutions by richwmiller, ahodges2105:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! Add up all your marbles. Are you missing any of your marbles?
Probability is available/total
There are 5 rainbow available.
How many marbles total?
Since you put the rainbow marble back, the total is the same for the lavender draw.
You can put this solution on YOUR website! The correct answer to your question is....
First you need to add up your total amount of marbles... 7+11+5=23
Next you need to find the probability of drawing a rainbow marble... 5/23
Then it says that the rainbow marble is placed back into the bag, and a second marble is drawn, so we need to find the probability of selecting a lavender marble... 7/23
So the answer is..... 5/23, 7/23
The only way the amount of marbles (the denominator) would have changed is if the question said that the first marble drawn was not placed back into the bag. If that was the case then our denominator or amount of marbles would have changed to 22 instead of 23. Does this make sense and help you out?
