Sophia has a bag with 3 purple marbles and 4 blue marbles in it. She is going to randomly draw a marble from the bag 280 times, putting the marble back in the bag after each draw.Complete the following statement with the best prediction.Sophia will draw a purple marble...Choose 1 answer:(A) Exactly 120 times(B) Close to 120 times but probably not exactly 120 times(C) Exactly 160 times(D) Close to 160 times but probably not exactly 160 times
Q. Sophia has a bag with 3 purple marbles and 4 blue marbles in it. She is going to randomly draw a marble from the bag 280 times, putting the marble back in the bag after each draw.Complete the following statement with the best prediction.Sophia will draw a purple marble...Choose 1 answer:(A) Exactly 120 times(B) Close to 120 times but probably not exactly 120 times(C) Exactly 160 times(D) Close to 160 times but probably not exactly 160 times
Calculate Total Marbles: Sophia has a total of 3 purple marbles and 4 blue marbles, making it 3+4=7 marbles in total.
Calculate Probability of Drawing Purple Marble: The probability of drawing a purple marble in a single draw is the number of purple marbles divided by the total number of marbles, which is 73.
Predict Number of Purple Marbles in 280 Draws: To predict how many times Sophia will draw a purple marble in 280 draws, we multiply the probability of drawing a purple marble by the total number of draws: (73)×280.
Calculate Expected Number of Purple Marbles: Calculating the expected number of times Sophia will draw a purple marble gives us (73)×280=3×40=120 times.
Considerations for Actual Draws: While the calculation gives us an exact number, in practice, the actual number of times Sophia draws a purple marble will likely be close to 120 but not exactly 120 due to the randomness of each draw.
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