Tutors Answer Your Questions about Permutations (FREE)
Question 1049081: I have never done a problem such as the following, and my book isn't helping. My answer must be a whole number.
Let
U = {x | x is the name of one of the months in a year}
J = {x | x is in U and x begins with the letter J}
Y = {x | x is in U and x ends with the letter Y}.
Find n(J ∪ Y).
Click here to see answer by solver91311(24713)   |
Question 1049298: 6 freshmen, 6 sophomores, 7 juniors, and 6 seniors are eligible to be on a committee.
In how many ways can a dance committee of 10 students be chosen if it is to consist of exactly 2 juniors and exactly 3 seniors, and the rest must be freshman or sophomores?
Click here to see answer by jorel555(1290) |
Question 1049339: There are 9! ways to arrange the digits 1-9 to form a 9-digit number. If you know this, then if you wrote all 9! possibilities on cards (1 way per card), and asked your friend to select one at random; what is the probability that the number he/she selected is prime?
Click here to see answer by ikleyn(52777)  |
Question 1049514: In a group of 20 people, how long will it take each person to shake hands with each of the other persons in the group, assuming that it takes three seconds for each handshake and only two people can shake hands at a time? How long if the group size is increased to 40 people?
Click here to see answer by jorel555(1290) |
Question 1050548: A multiple choice test consists of 8 question; each with 4 possible answers but only one of which is correct. In how many ways can a student answer the 8 question and
a. Get them all correct?
b. Get them all wrong?
c. Fet atleast one correct answer?
Click here to see answer by ewatrrr(24785)  |
Question 1050835: A group of 4 members is tobe formed from 5men and 4 women. how many groups may be formed? That the group consist of
a. All men
b. 2men and 2women
c. exactly 3 women
d. atleast 3women
e. atleast 1man
f. Mr. Cruz, one of the men is the head of the commitee
g. mr. and mrs. Cruz refused to be a member of the committee
Click here to see answer by ewatrrr(24785) |
Question 1050950: To play LOTTO 6/49 you choose six numbers from 1 to 49. On each draw date, the International Lottery Corporation generates (randomly) six winning numbers from 1 to 49.
How many different ways can they generate the six winning numbers?
What is the probability of winning the Jackpot, that is to match 6 of the 6 winning numbers?
What is the probability to match 4 of the 6 winning numbers?
Click here to see answer by stanbon(75887) |
Question 1050949: The telephone company is adding two new exchanges to its service area. The seven-digit telephone numbers for these new exchanges must begin with either a 5 or a 6. How many numbers are available to the telephone company for the new exchanges?
Click here to see answer by josmiceli(19441)  |
Question 1052575: hey i'm having trouble on this question i've tried 7 times and different equations but i just cant get it:
There are 24 students in your class. Your teacher wants to put you in groups for your data-
management project. How many ways can six groups of four be made if
A)there are no restrictions
Answer=4.509 x 10^12 (will also accept 3.247 x 10^15)
Thankyou.:)
Click here to see answer by Theo(13342)  |
Question 1052890: hi there, I am stuck on a problem trying to find p(e^c)... if s:7,8,9,10,11,12,13,14,15,16,17,18 and if e:8,9,10,11,12. not sure how to solve. thank you
Click here to see answer by stanbon(75887) |
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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
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