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Probability Videos 45 videos

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Elementary Probability 558 Views


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Description:

It’s time for the annual Dynamite and Explosives Conference, where we'll learn about elementary probability with Max Goboom. Max decided to rig all of the prime number tables with explosives. Solve the example problem to figure out the probability of a random guest sitting at a booby-trapped table. We have a feeling you're going to do a dynamite job.

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Transcript

00:05

Elementary Probability, a la Shmoop. It's time for the annual Dynamite and Explosives

00:11

Conference. Since it started ten years ago, this thing

00:14

has really... blown up. Max Goboom <<Go-Boom>> is the event coordinator

00:18

in charge of organizing the conference. Because of the explosive personalities involved,

00:24

he must carefully lay out seating charts or risk <batman style> ka-blam!

00:28

He has arranged all 36 square tables in a 6 by 6 formation.

00:34

As an added treat, he has rigged all prime numbered tables to detonate at the flip of

00:39

a switch. Oh, that joker.

00:50

What are the chances that any random attendee... ...may wind up with chunks of wood in their

00:55

chicken caesar? Here are your choices:

01:07

Really no way to solve this one other than to count the prime numbers.

01:11

So... look for numbers that are not divisible by anything other than 1 and themselves.

01:15

We get, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31...

01:30

Did you count 11 of them? So did we. Now take 11 and divide it by the total number

01:43

of tables: 36. Convert to a percentage by moving the decimal

01:50

two places to the right and adding a percent sign.

01:54

...Answer "C" it is. So each attendee has a 30 point 6 percent chance of getting a booby-trapped

02:04

table. Max's ill-advised surprise created quite a

02:07

mess... ...but at least no one was hurt.

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