Wednesday, July 28, 2010

Probabilty

Braiden has gone on a field trip with his class to the zoo. However, he has gotten lost. It is time to leave, and he needs to find the right bus to get on to go to school. Braiden attends Cheyenne Middle School. In the parking lot, there are 3 buses from Cheyenne Middle School, 5 buses from Farmington Elementary, and 6 buses from Hollis Middle School. Unfortunately, all these buses look alike. If Braiden goes up to a bus at random, what is the probability that will be the wrong bus?

As we can see there are only 3 buses that go to the school that Braiden wants to go to.
On the other hand there are 5 from Farmington and 6 from Hollis.

If we think we know that 5+6=11

the probability of Braiden going to the incorrect bus is

11/3 when simplified will equate to 3 2/3

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