Mathematics, 06.08.2022 18:40, highspeed3371
Consider an urn containing 8 white balls, 7 red balls and 5 black balls.
1)Randomly select 2 balls without replacement. The probability of getting 2 white balls is equal to:
2)Randomly select 5 balls without replacement. the probability of getting 2 white balls is equal to:
3) randomly select 150 balls with replacement. The probability of getting at least 72 white balls is:
Answers: 2
![=\sum^{150}_{k=72} [C^{k}_{150}\times \left( \frac{8}{15} \right)^{k} \times \left( \frac{7}{15} \right)^{150-k}]](/tpl/images/2817/6878/d7bf6.png)
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Consider an urn containing 8 white balls, 7 red balls and 5 black balls.
1)Randomly select 2 balls...
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