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Code Words How many different 9-letter code words can be made using the symbols $\%, \%, \%, \%, \&, \&,$ $\&,+,+?$
1260
Intro Stats / AP Statistics
Chapter 4
Probability and Counting Rules
Section 4
Counting Rules
Sampling and Data
Probability Topics
Missouri State University
University of North Carolina at Chapel Hill
Boston College
Lectures
0:00
01:06
Code Words How many differ…
05:31
How many distinguishable c…
02:41
Forming Codes How many dif…
00:33
How many four-letter permu…
02:32
02:21
Forming Codes How many two…
00:22
01:20
How many different four-le…
00:26
04:00
01:15
How many different three-l…
01:17
How many code symbols can …
00:45
How many two-letter codes …
01:02
02:47
Secret Code Word How many …
How many six-letter permut…
01:19
Permuting Letters How many…
01:36
How many arrangements can …
01:24
here we had to find out the nine letter code words from given symbols here. Total number off symbols are nine. Some symbols are repeated. So let's see of its symbol depicted in how many times? First percent a symbol reputed in four times. That is odd one and nets and symbol is the pewter. In three times, that is our toe on a less symbol is repeated in two times. That is, our three are means do tradition lines. Now we will find out the total number off nine Little Cor Boers. Further formula is and factorial. Do you read it by Are one factorial in tow? Are two factorial in tow are three factorial now We will substitute the values off and R one R, two R three and east nine factorial and hard one is four factorial into our two is three factorial and are three is two factorial not let's simplify. Nine. Factory is nine in tow, eight in tow, seven in tow, six indoor five into four into three in tow. Do in tow. One No. Four factory. It is for in tow. Three into doing to one into three. Factorial is three into do in tow. One and two factorial is doing to one now we will cancel four factorial in numerator and denominator. If you multiply nine into four into seven into far, ease 1260 so we can make 1260 court wards off nine letters.
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