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Please help due mon and would love to have this turned in sooner becuase then i will be able to have time to do my other assignments

Please help due mon and would love to have this turned in sooner becuase then i will-example-1

1 Answer

2 votes

Answer:

There are a total of 10 + 15 + 25 = 50 marbles in the bag, and 10 of them are red. Therefore, the probability of Tammy selecting a red marble on any given draw is 10/50 = 1/5.

Since Tammy is returning the marble to the bag after each draw, the probability of selecting a red marble on any given draw remains the same. This means that each of the 90 draws is an independent event with a probability of 1/5 of selecting a red marble.

To find the expected number of times Tammy will select a red marble in 90 draws, we can use the formula:

Expected number of red marbles = Total number of draws x Probability of selecting a red marble on any given draw

Expected number of red marbles = 90 x 1/5

Expected number of red marbles = 18

Therefore, Tammy can expect to pull out a red marble approximately 18 times in 90 draws.

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