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A bag contains 8 red marbles, 4 blue marbles and 5 green marbles. If three marbles are drawn out of the bag, what is the probability, to the nearest 10th of a percent, that all three marbles drawn will be green?
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A bag contains 88 red marbles, 44 blue marbles and 55 green marbles. If three marbles are drawn out of the bag, what is the probability, to the nearest 1010th of a percent, that all three marbles drawn will be green?\newlineAnswer:

Full solution

Q. A bag contains 88 red marbles, 44 blue marbles and 55 green marbles. If three marbles are drawn out of the bag, what is the probability, to the nearest 1010th of a percent, that all three marbles drawn will be green?\newlineAnswer:
  1. Determine total marbles: Determine the total number of marbles in the bag.\newlineThe bag contains 88 red marbles, 44 blue marbles, and 55 green marbles. To find the total, add these numbers together.\newlineTotal marbles = 88 red + 44 blue + 55 green\newlineTotal marbles = 1717 marbles
  2. Calculate green marble probability: Calculate the probability of drawing one green marble.\newlineSince there are 55 green marbles out of 1717 total marbles, the probability of drawing one green marble is:\newlineProbability of one green marble == Number of green marbles // Total number of marbles\newlineProbability of one green marble =517= \frac{5}{17}
  3. Calculate second green marble probability: Calculate the probability of drawing a second green marble after one has already been drawn.\newlineAfter drawing one green marble, there are now 44 green marbles left and 1616 marbles in total.\newlineProbability of second green marble = Number of remaining green marbles / Total remaining marbles\newlineProbability of second green marble = 416\frac{4}{16}
  4. Calculate third green marble probability: Calculate the probability of drawing a third green marble after two have already been drawn.\newlineAfter drawing two green marbles, there are now 33 green marbles left and 1515 marbles in total.\newlineProbability of third green marble = Number of remaining green marbles / Total remaining marbles\newlineProbability of third green marble = 315\frac{3}{15}
  5. Calculate combined probability: Calculate the combined probability of drawing three green marbles in a row.\newlineTo find the combined probability, multiply the probabilities from each of the previous steps.\newlineCombined probability = Probability of one green marble ×\times Probability of second green marble ×\times Probability of third green marble\newlineCombined probability = (5/17)×(4/16)×(3/15)(5 / 17) \times (4 / 16) \times (3 / 15)\newlineCombined probability = (5×4×3)/(17×16×15)(5 \times 4 \times 3) / (17 \times 16 \times 15)\newlineCombined probability = 60/408060 / 4080\newlineCombined probability = 1/681 / 68
  6. Convert to percentage: Convert the probability to a percentage and round to the nearest tenth of a percent.\newlineTo convert to a percentage, multiply the probability by 100100.\newlinePercentage = Combined probability ×100\times 100\newlinePercentage = (1/68)×100(1 / 68) \times 100\newlinePercentage 1.47%\approx 1.47\%\newlineSince we need to round to the nearest tenth of a percent, the final answer is 1.5%1.5\%.

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