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CAHSEE Math 6.4 Statistics, Data, and Probability I 206 Views


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Description:

Statistics, Data, and Probability I: Drill Set 6, Problem 4. What is the probability of rolling a four and then rolling an even number on a fair-numbered die?

Language:
English Language

Transcript

00:03

Here's a boring, unshmoopy question you'll find on an exam somewhere in life.

00:08

What is the probability of rolling a four and then rolling an even number on a fair-numbered die?

00:15

And here are the potential answers...

00:17

It's a vanilla two-step dance in Probabilityland.

00:21

There are 6 sides to a die.

00:23

As long as you're not engaged in a role-playing game in your parents' basement.

00:30

Rolling any one number carries a 1 in 6 chance.

00:34

Then we roll a second time and, since there

00:36

are 3 even numbers out of six...

00:39

...our odds are 3 out of 6 or 1 out of 2 on that second die...

00:43

... or 50-50 in gambler lingo.

00:45

To get the total odds of both things happening,

00:49

we just multiply them -- and we get: 1/6 times 1/2 which is one-twelfth...

00:54

and the answer is B.

00:56

In gambler lingo, we're guessing that would be 50... 600?

01:01

Doesn't have quite the same ring to it as that 50-50 thing...

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