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alana62
21.03.2020 •
Mathematics
In a large bag of marbles, 20% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles? (Assume this is Binomial)
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Ответ:
0.0256
Step-by-step explanation:
Assuming a binomial model, with probability of success (getting a red marble) p = 0.20. The probability of obtaining 'k' successes in 'n' trials is:
For k = 3 red marbles in n = 4 trials:
The probability that the child gets exactly three red marbles is 0.0256.
Ответ: