- Title : MA40S APPLIED AND PRE CALC PERMUTATIONS AND COMBINATIONS SUMMARY AND ... permutations and combinations worksheet in Common Worksheets category
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Some questions frequently asked by users : permutations?
i've been out of school for about a week ; i'm really sick. & i picked up my homework today and i got a worksheet on permutations. - i'm in seveth grade & intermediate math. this is what it says - use the letters p, e, a, r and s. find the number of permutations & the number of combinations. 1. 2 vowels. 2. any 3 letters. __________ _________ ^ i don't get how to do them, at all.permutations and combinations?
hi! i broke my leg last month and haven't been in school :( my trig. teacher gave me worksheets but no notes and i've read reviewbook after review book and i still don't get this topic! i'm not just looking for answer here, i really want to learn so if you could explain it to me please and show me what you did step by step. also how can i tell the difference whether it's a permutation or combination. here are some of the questions, thank you in advance. 3) a record store sells music from 12 different musical categories. if you buy 4 cds, how many different ways are there to choose them from 4 dfferent categories? 4) a farmer has seven dairy cows. in how many different orders can he choose to milk them? i think i know how to do this one. is it just 7!= 5040 5) mike brings 11 cds, numbered 1-11, to a party. how many different ways can he choose the first 5 cds to play? 6)in how many ways can twelve people running in a race finish 1st, 2nd, and 3rd place? i got 1,320 ways is that right? i did 12 x 11 x 10 and 7) in how many ways can 2 random people each have different birthdays in a non-leap year?i don't understand combinations and permutations ?
a key pad lock has 10 different digits, and a sequence of 5 different digits must be selected for the lock to open. how many key pad codes are possible? i have some formulas but i'm not sure how to use them. (i missed a day of class, and this is the one thing thats not covered in our books) npr= ____n!____ (n-r) ! ncr = ____npr____ = ____n!____ r! (n-r) ! r! there's a lot of questions on the worksheet but i think if i can just figure out how to do one i'll be able to get the rest.excel permutations code need help!!!?
i have a sting of numbers: 36748785 and i want to generate all the possible unique permutations. eg: 36784875 36787845 36778485 36778485 36784875 36787845 my problem is when i generate the numbers, the 'unique' combinations is generated 4 times. this is the excel code i used. any ideas? dim r as long, c as long, strarray() as string, stemp as string sub perms() dim instring as string r = 0: c = 0: erase strarray() instring = inputbox("enter text to permute:", "permutations", "0,2,3,4,5,6,7,8,9") if instr(instring, ",") = 0 then exit sub strarray = split(instring, ",") if ubound(strarray) - lbound(strarray) 1 <= 9 then with application .screenupdating = false .calculation = xlcalculationmanual .enableevents = false call getperms("", left("012345678", ubound(strarray) - lbound(strarray) 1)) range(activecell, activecell.offset(0, c)).columns.autofit .screenupdating = true .calculation = xlcalculationautomatic .enableevents = true end with else: msgbox "too many permutations!" end if end sub private sub getperms(x as string, y as string) dim i as integer, j as integer, k as integer j = len(y) if j < 2 then for k = 1 to len(x & y) stemp = stemp & strarray(cint(mid(x & y, k, 1))) & "," next k activecell.offset(r, c) = left(stemp, len(stemp) - 1) stemp = "" if activecell.row r < rows.count then: r = r 1: else: r = 0: c = c 1 else for i = 1 to j call getperms(x mid(y, i, 1), left(y, i - 1) right(y, j - i)) next i end if end sub private sub worksheet_selectionchange(byval target as range) end subalgebra probability story problems?
i really need help with my algebra homework, which is all about probability. i have a quiz tomorrow and my teacher hasn't gone over any of the worksheets with us so pi wanted to check my answers. lease help me answer these problems! they are either combination of permutation in probability! i don't under stand how to tell the difference between them.. 1.) a teacher is holding tryouts for the school play. there are 15 students trying out for 7 parts in the play. each student can play each part. in how many ways can the teacher select the students? 2.) a youth indoor soccer team has 6 starting players. the starting players must consist of 3 boys and 3 girls. there are 7 boys and 6 girls on the team. each player can play each position. in how many ways can the coach select players to start the game? 3.) you have a plastic sheet that hold 9 trading cards. you want to fill the sheet with football cards consisting of 4 quarterbacks, 3 running backs, and 2 wide receivers. in your collection of cards, you have 10 quarterbacks, 7 running backs, and 8 wide receivers. in how many different way can you select the cards? thank you so much and please show me your work! i just want to know if you used permutation or combination.
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