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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.

Language:

English Language

Subjects:

Probability / Probability

Common Core Standards:

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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