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?Answer:
Q. 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?Answer:
Determine total marbles: Determine the total number of marbles in the bag.The bag contains 8 red marbles, 4 blue marbles, and 5 green marbles. To find the total, add these numbers together.Total marbles = 8 red + 4 blue + 5 greenTotal marbles = 17 marbles
Calculate green marble probability: Calculate the probability of drawing one green marble.Since there are 5 green marbles out of 17 total marbles, the probability of drawing one green marble is:Probability of one green marble = Number of green marbles / Total number of marblesProbability of one green marble =175
Calculate second green marble probability: Calculate the probability of drawing a second green marble after one has already been drawn.After drawing one green marble, there are now 4 green marbles left and 16 marbles in total.Probability of second green marble = Number of remaining green marbles / Total remaining marblesProbability of second green marble = 164
Calculate third green marble probability: Calculate the probability of drawing a third green marble after two have already been drawn.After drawing two green marbles, there are now 3 green marbles left and 15 marbles in total.Probability of third green marble = Number of remaining green marbles / Total remaining marblesProbability of third green marble = 153
Calculate combined probability: Calculate the combined probability of drawing three green marbles in a row.To find the combined probability, multiply the probabilities from each of the previous steps.Combined probability = Probability of one green marble × Probability of second green marble × Probability of third green marbleCombined probability = (5/17)×(4/16)×(3/15)Combined probability = (5×4×3)/(17×16×15)Combined probability = 60/4080Combined probability = 1/68
Convert to percentage: Convert the probability to a percentage and round to the nearest tenth of a percent.To convert to a percentage, multiply the probability by 100.Percentage = Combined probability ×100Percentage = (1/68)×100Percentage ≈1.47%Since we need to round to the nearest tenth of a percent, the final answer is 1.5%.