Monday, April 9, 2007

Marsha, Monday, April 9th

SO, I'm sure most everyone has started accelerated math and there are likely problems you will not understand. I took the liberty of surfing the old Math Wiki and tracked down some questions and explanations that I think should help.

A drawer contains 10 red socks, 4 white socks, and 8 blue socks. Without looking, you draw out a sock, return it, and draw out a second sock. What is the probability that the first sock is red and the second sock is white?

Two urns each contain green balls and yellow balls. Urn 1 contains four green bals and four yellow balls and urn two contains four green balls and three yellow balls. A ball is drawn from each urn what is the probability that both balls are yellow?

Two cards are drawn in succession from a deck of 52 playing cards. Find the probability that the king of clubs and any jack are drawn, in that order, without replacement.

Suppose that a license plate for a certain province consists of 5 distinct letters chosen form a distinct list of 8 letters followed by a 6 digit number where 0 is not the first digit which of the following expressions shows how many different license plates are possible? First figure out how many choices can be made for the letters or the numbers first your choice then find out the same for what’s left.

How many distinct arrangements can be made with the letters in the word SASKATCHEWAN? (is this correct?)

The Morse code is a system of dashes, dots, and spaces once used in Canada to send messages by telegraph. How many 7-character messages could be sent using 2 dashes and 5 dots?

There are 64 teams in a soccer tournament. Each team plays until it loses one game. There are no ties. How many games are played?

Firstly, Thanks Nemo for taking over my scribing duties as I was away. Today in class we did corrections, I'll make sure to post the slides as soon as I get back onto the laptops at school. For now bare with me as I complete the other part of the assigned math work and give you my explanation of permutations.

Google defines 'permuntation' as:
A reordering of that set where each element appears exactly once. For example, "egam" is a permutation of "game", or "2431" is a permutation of "1234".

I was searching through the old blog from last semester and found a post I had done a while back. Here's an example I had posted:

Jayla has two back pockets and one front pocket. She has 4 coins, how many ways can she put the coins in her pocket?

We figure this out by asking ourselves
"how many ways can each coin be put in?" The answer is three seperate ways. Since Jayla had four coins we determine that the equation will be 3*3*3*3, which equals 81.

If you want to read the rest, click here.

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