Multiplication Principle - Counting Techniques

[sarazuu]

I need help with this question. If possible use an equation and if you could explain that would be great :)

A letter is selected at random from the alphabet. Find the probability that the letter is a vowel or comes from the word HELPFUL

[lostinnecropolis]

Really helped me out. Thanks!

[Sarisusan]

Today I learned the mathematical proof on why I shouldn't haphazardly guess on the SATs. Thanks for the math and motivation...

[lovelytkay]

thanks! this was very helpful  :)

[wittysarah]

Left handed people are smarter. Anyway, I'm confused, my professor told us we can't used 0 in 1st dial...I was wondering why did you apply 0 in 3:14...as far as I know we haven't yet discussed permutation. And I'm not sure if the 0 thing I'm asking you is combination?.

[NWNCGLuv]

For the multiple choice question, aren't there technically 6 ways to answer each question because you can either pick A-E or decide to not answer at all? Or in the problem are we assuming that you have to pick a choice?

[MrDromaeosaurid]

As to the final problem, if > 7/10 is failing and there are 10 questions and 5 possible answers for each, what method can you use to determine in what number of the possible 9,765,625 outcomes you would score < 7/10?

Great video!

[zeeksy]

thank uu soo much!!

[neploxojxxx]

thanking u sir

[galopekat]

you rock. :D

[runevider]

i love this stuff

i like math teachers that have humor '' big house or maybe thats the little house i havent been to jail yet'' lol yet means there is a chance

[moaxcp]

Does order matter in the multiplication principle? In other words when counting is AAB the same as BAA?

[djravirave]

thanks for the clarification.......this video has been very informative!

[mariah128]

This video and the permutations and combinations videos were really helpful to me! You're awesome! The only problem was that I kept expecting to smell that Sharpie in the air, hah

[MsMystery92]

So are you saying that with all basic counting principle questions ,repitition is allowed?:S

[gohogsgo123]

lol!

" I havent been to jail...yet"

[maniaciswicked]

ahahaha I'd love for someone to be watching this going....oh shit this is my code :)

[favoradet]

nice one here. good job

[SeFu2006]

I'm starting to understand better, do you have videos on permutations and combinations? My math book doesn't explain that well either

[petmaster495]

This cleared up my questions about the counting principle.  Do you have any videos about Pascal's Triangle? My mathbook doesn't explain that very well.

[patrickJMT]

no pascal's triangle yet!

[maiithri110]

@petmaster495

If we have 2 pair of blue shirrt,1 white shirt,pair of blue pant and pair of white pant,in how many ways one can wear itI got answer as 8 but its actually 6...how is that

[crowbat]

like completing the square like

[crowbat]

you complete me

[patrickJMT]

in what sense? cause, i find that sort of hard to believe : )

[theteaprincess]

I have watched several of your videos and you have helped me so much in my intermediate algebra class. Your explanations and examples are excellent. Thank you so much!!

[patrickJMT]

wonderful! glad that i have been of some service to you

[desmonrock21]

Hey Patrick please help me in this problem.

Prob: From the digits 0 1 2 3 4 5 and 6, how many three-digit even numbers can be formed if each digit can be used only once?

[patrickJMT]

i will guess that you can make 120

imagine picking the numbers  ___ ___ ___

to fill in the blanks. pick the 'ones' digit first - you have 4 choices for this number (since it must be even) leaving 6 choices for the middle digit and 5 for the 'hundreds' digit

[desmonrock21]

thanks..

how about this problem Pat.

From the digits 0 1 2 3 4 5 and 6, how many three-digit numbers greater than 330 can be formed if each digit can be used only once?

please explain how to solve it.

[patrickJMT]

hahah - i am like a drug dealer.

the first taste is free.

subsequent samplings require more incentives!

[Xinrful]

@desmonrock21 There are 3*3*5 = 45 permutations. ;)

[JVILGking]

thank you very much

[patrickJMT]

no problem

[xBEAUTiiFUL]

THANK YOU .

[patrickJMT]

my pleasure : )