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Question
Math
Posted 10 months ago

A jar contains 6 red jelly beans, 6 green jelly beans, and 6 blue jelly beans.
If we choose a jelly bean, then another jelly bean without putting the first one back in the jar, what is the probability that the first jelly bean will be green and the second will be green as well?
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Answer from Sia
Posted 10 months ago
Solution by Steps
step 1
Calculate the probability of picking the first green jelly bean
step 2
There are 6 green jelly beans out of 18 total, so the probability is 618 \frac{6}{18}
step 3
Calculate the probability of picking the second green jelly bean without replacement
step 4
After one green jelly bean is taken, there are 5 green jelly beans left out of 17 total, so the probability is 517 \frac{5}{17}
step 5
Multiply the probabilities from step 2 and step 4 to find the combined probability
step 6
The combined probability is 618×517=13×517=551 \frac{6}{18} \times \frac{5}{17} = \frac{1}{3} \times \frac{5}{17} = \frac{5}{51}
step 7
Simplify the fraction 551 \frac{5}{51} to get the final probability
step 8
The simplified fraction is 551=110.2 \frac{5}{51} = \frac{1}{10.2} , which is approximately 0.09804 or 9.804%
Answer
The probability that the first jelly bean will be green and the second will be green as well is approximately 9.804%.
Key Concept
Probability of consecutive events without replacement
Explanation
To find the probability of two consecutive events without replacement, multiply the probability of the first event by the probability of the second event, considering the change in total number of outcomes after the first event.

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