Mathematics: Adie is rolled 13 times. what is the probability of at least two 2 s appearing? (round your answer to four decimal places.)

Adie is rolled 13 times. what is the probability

Ответ:

hudaalkhatib27

12.03.2022

Much easier to work with its complement. (Hint: when it says AT LEAST in probability, you should much rather work with the complementary pairing)

$\text{Pr(at least two 2's) = 1 - Pr(1 2) - Pr(no 2's)}$
$\text{Pr(1 2's)} = \binom{13}{1}\left( \frac{1}{6}^{1} \cdot \frac{5}{6}^{12}\right)$
$\text{Pr(no 2's)} = \left(\frac{5}{6}\right)^{13}$

$\therefore \text{Pr(at least two 2's)} = 0.663530036... \text{ (by calculator work)}$

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Ответ:

familyvazquez7

09.07.2020

Mathematics

At the burger shop the ratio of regular sodas to diet sodas sold was 3:6. For every_3__ diet sodas sold there are_6__ regular sodas sold.

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Adie is rolled 13 times. what is the probability of at least two 2's appearing? (round your answer to four decimal places.)

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