Ctrl+V Thread

[Nix]

EdScheme,


...Right.

[Cider]

http://andrewsullivan.thedailybeast.com ... 2/zer.html

[Jecka]

iTfw1CJUoiDQ

I think I was posting something :V

[Callid]

[SS stuff, again] :x

[miakakiri]

{SS stuff}

Right, that WAS the last thing I copied, because I was up until silly o'clock in the morning getting it ready. ~_~*

[redangelran]

http://www.youtube.com/watch?NR=1&v=xTA ... =endscreen

[miakakiri]

/msg NickServ confirm L0p5dwIen

Uh.... re-registering nicks on synIRC

[Callid]

viewtopic.php?p=742984#p742984

[ranshinkawaii]

Complement of an Event Unit 6 > Lesson 4 of 12


Experiment 1:   A spinner has 4 equal sectors colored yellow, blue, green and red. What is the probability of landing on a sector that is not red after spinning this spinner?
 
Sample Space:   {yellow, blue, green, red}
Probability:   The probability of each outcome in this experiment is one fourth. The probability of landing on a sector that is not red is the same as the probability of landing on all the other colors except red.
P(not red)  =  1  +  1  +  1  =  3
4 4 4 4
In Experiment 1, landing on a sector that is not red is the complement of landing on a sector that is red.

Definition:   The complement of an event A is the set of all outcomes in the sample space that are not included in the outcomes of event A. The complement of event A is represented by  (read as A bar).

Rule:   Given the probability of an event, the probability of its complement can be found by subtracting the given probability from 1.
P() = 1 - P(A)

You may be wondering how this rule came about. In the last lesson, we learned that the sum of the probabilities of the distinct outcomes within a sample space is 1. For example, the probability of each of the 4 outcomes in the sample space above is one fourth, yielding a sum of 1. Thus, the probability that an outcome does not occur is exactly 1 minus the probability that it does. Let's look at Experiment 1 again, using this subtraction principle.

Experiment 1:   A spinner has 4 equal sectors colored yellow, blue, green and red. What is the probability of landing on a sector that is not red after spinning this spinner?
Sample Space:   {yellow, blue, green, red}
Probability:  
P(not red)  =  1  -  P(red)
 
 =  1  -  1
4
 
 =  3
4
Experiment 2:   A single card is chosen at random from a standard deck of 52 playing cards. What is the probability of choosing a card that is not a king?
Probability:  
P(not king)  =  1  -  P(king)
 
 =  1  -   4 
52
 
 =  48
52
 
 =  12
13
Experiment 3:   A single 6-sided die is rolled. What is the probability of rolling a number that is not 4?
 
Probability:  
P(not 4)  =  1  -  P(4)
 
 =  1  -  1
6
 
 =  5
6
Experiment 4:   A single card is chosen at random from a standard deck of 52 playing cards. What is the probability of choosing a card that is not a club?
Probability:  
P(not club)  =  1  -  P(club)
 
 =  1  -  13
52
 
 =  39
52
 
 =  3
4
Experiment 5:   A glass jar contains 20 red marbles. If a marble is chosen at random from the jar, what is the probability that it is not red?
Probability:  
P(not red)  =  1  -  P(red)
 
 =  1  -  1
 
 =  0
 
Note: This is an impossible event.
Summary:   The probability of an event is the measure of the chance that the event will occur as a result of the experiment. The probability of an event A, symbolized by P(A), is a number between 0 and 1, inclusive, that measures the likelihood of an event in the following way:
If P(A) > P(B) then event A is more likely to occur than event B.
If P(A) = P(B) then events A and B are equally likely to occur.
If event A is impossible, then P(A) = 0.
If event A is certain, then P(A) = 1.
The complement of event A is .    P() = 1 - P(A)

( failed my biostat exam by one point

[miakakiri]

:o479601080

Um.... I was trying to track an order, but it didn't send me the tracking info......

[Callid]

3N211Y5300DBA00BFFC49D000010060BAMN1837108001011L13833CC5F59FE1V107F3FCC004CB2

o.O
I have no idea :x

[miakakiri]

Code: Select all

[quote="Rea"]

Um.... I was replying to a PM and wanted to respond to pieces of the message bit by bit and there was no way I was going to type all that out each time...

[cinnamoroll]

☼

The sun??? A spider?

[breva]

lyryx

[Callid]

3N1V1651303333FE808CFE01000934141MQ1836404000001U0FEF200FEE78F0S107F3FCC004CB2

Still no idea :/