Tutors Answer Your Questions about Permutations (FREE)
Question 742413: I' am preparing for a test and one question that will be similar to the one on the test will be “How many ways can a teacher choose two students from a group of four students?” I looked the answer up and it is six but how do you get this answer or how do you solve this problem?
Click here to see answer by Edwin McCravy(20054)  |
Question 743130: If someone can take only 4 out of 7 classes offered during the summer. How many different ways can she choose the classes she will take?
I figured 4x7 is 28 but that answered, I was told, is incorrect. I'm trying to just write out all of the possible ways, but I know there has to be a formula of some type.
Thanks!!!
Click here to see answer by checkley79(3341) |
Question 743130: If someone can take only 4 out of 7 classes offered during the summer. How many different ways can she choose the classes she will take?
I figured 4x7 is 28 but that answered, I was told, is incorrect. I'm trying to just write out all of the possible ways, but I know there has to be a formula of some type.
Thanks!!!
Click here to see answer by rothauserc(4718)  |
Question 743455: Nine cards are marked with the numbers 1,2,3,4,5,6,7,8, and 9 then shuffled, and the three cards are drawn. How many different three-card combinations are possible? How many three-card hands contain a number less than three?
Click here to see answer by stanbon(75887) |
Question 745083: Suppose that you have 3 different math books, 4 different chemistry books, and 5 different
biology books that you wish to put on a bookshelf. In how many ways can this be done if
all of the books of each type must be placed together (all of the math books need to be
together, all of the chemistry books need to be together, and all of the biology books
need to be together)?
Click here to see answer by stanbon(75887) |
Question 7932: I wasn't sure where to put this because my text is Inequalities, Permutations, and Probability. Can someone show me how to so this problem? How many different permutations can you make with the letters a b c d e f g h i . I am not sure how to set this problem up, Can someone please help me? I need to know how to do this before tomorrow (8-22-05)
Click here to see answer by Levski123(6) |
Question 746487: "Determine how many different computer passwords are possible if the given number of digits (0-9) and the letters (A-Z) can be repeated and cannot be repeated."
5 digits followed by 2 letters
Repeated:
Not repeated:
I tried an example for repeated - 2-2-2-2-2-B-B but am not sure if that is correct or how to finish the problem.
Thank You.
Click here to see answer by solver91311(24713)  |
Question 746487: "Determine how many different computer passwords are possible if the given number of digits (0-9) and the letters (A-Z) can be repeated and cannot be repeated."
5 digits followed by 2 letters
Repeated:
Not repeated:
I tried an example for repeated - 2-2-2-2-2-B-B but am not sure if that is correct or how to finish the problem.
Thank You.
Click here to see answer by Alan3354(69443)  |
Question 746789: A bag has 3 red and 5 purple marbles. One is drawn out at random and not replaced. Then a second marble is drawn out at random. What is the probability that the first marble is purple and the second is red?
Click here to see answer by Cromlix(4381)  |
Question 746416: A box contains 10 discs: 5 yellow, 3 blue, 2 green. Two discs are selected without replacement. What is the probability that the first disc was blue given that the second disc was blue?
I keep getting the wrong answer and I don't understand why. Thank you!
Click here to see answer by Cromlix(4381)  |
Question 163408: I need to figure out how many possible milkshake combinations there can be with 64 ingredients. No ingredient can be used more than once in a combination and there is a max of 5 ingredients per combination.
Thanks for your help.
Click here to see answer by Levski123(6) |
Question 747297: In Minnesota, license plates have 3 letters followed by 3 numbers or vice versa. You can repeat no more than two letters in any order. How many possible license plates are there?
Must show all work, can someone please assist me?
Click here to see answer by stanbon(75887) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035
|