Wednesday, May 31, 2006

Review help

Well we started probability.

Number of favoured outcomes
_____________________
Number of possible outcomes

example: flipping a coin
you want to flip a heads
there is 2 possible outcomes and you only want 1 outcome.
so it would be a 50 50 chance or 1:2

if you have 2 dice, you multiply the number of sides(6 in total) on one die by 6 on the other
so 6x6=36 possible outcomes
you want a 2
there is only one possible outcome to get 2
so it would be 1:36 chance of rolling a 2.
This is theoretical probability.
Experimental probability is different.

Example: Even though rolling a 2 is 1:36 chance, you still can roll a 2 more than once in thirty six times.
to get the closest to theoretical pr4obability, you just keep on rolling the die.

Next we did algebra

A question I made up was:

A guy is trying to find a perimeter that is 128 feet for his flower bed. But because of his awquard(don't mind spelling) yard, the length has to be 6 feet more that 5 feet less than 2 times the side of the width. What are the length and width of his pretty flower bed?

To answer this go

l=
l=
w=
w=

Too bad exams are over! It was ""fun!""




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