- #1

Drakkith

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- Thread starter Drakkith
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- #1

Drakkith

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- #2

jbriggs444

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If so, can you write a formula for the event to not occur at all in three tries?

- #3

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The chance of it not occurring in 3 tries is $$0.92^3$$

So, you want $$1- 0.92^3$$

- #4

jtbell

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1=no, 2=no, 3=no : probability = 0.92 * 0.92 * 0.92 = …

1=yes, 2=no, 3=no : probability = 0.08 * 0.92 * 0.92 = …

etc.

Enumerate all the outcomes (how many of them are there?), calculate the probability for each one, and add up the ones that meet your criterion.

- #5

Drakkith

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Awesome. Thanks guys.

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