Tutors Answer Your Questions about Permutations (FREE)
Question 728968: There are 40 people in a room. 23 are wearing jeans, 17 are wearing a T-shirt, and 12 are wearing both jeans and a T-shirt. If a person is selected at random, then find the probability that they are wearing jeans but not a T-shirt. Answer in fraction form and reduce.
Click here to see answer by solver91311(24713)   |
Question 729777: Hello, having issues with this question, please help
Using the digits 0 – 9, find out how many 4 digit passcodes (Like 0056 or 3984) can be configured based on the stated conditions.
The passcode must begin with an odd digit and end with an even digit. (Repetition OK)
Click here to see answer by fcabanski(1391) |
Question 729775: Hello, having issues with this question, please help.
Using the digits 0 – 9, find out how many 4 digit passcodes (Like 0056 or 3984) can be configured based on the stated conditions.
The passcode can't start with a 0, a 1, or a 2 and no digits may be repeated.
Click here to see answer by fcabanski(1391) |
Question 730640: how can i solve this quiz?
Flipping a fair coin 4 times. We win x euros when we bring x crowns unless we bring a single crown so not winning anything.
On average how many euros to win this game? (find the expected value)
i will use E(X)=np?
Click here to see answer by stanbon(75887) |
Question 730731: Your teacher chooses 2 students at random to represent your homeroom. The homeroom has a total of 30 students, including your best friend. What is the probability that you and your best friend are chosen?
Click here to see answer by lynnlo(4176) |
Question 731941: The integer X has probability density
fX(n) = 1/22 (1) (1<=n<=22)
and the integer Y TM has probability density
fY(n) = 1/17 (1) (1<=n<=17)
Symbolism: (1)... is 1 if the condition is in the parentheses its true and 0 otherwise.
TM Z is defined as follows: flipping a fair coin. If it comes up heads then we set Z = X else Z = Y. we
What is the expected value E{Z};
i need some help here to solve this
Click here to see answer by lynnlo(4176) |
Question 732090: A C.R and a wise C.R are selected from 50 students. How many different choices are
possible if
i) There is no restriction
ii) Mr.A will serve only if he is C.R
iii) Mr.B and Mr.C will serve together or not at all
iv) Mr.D and Mr.E will not serve together
Click here to see answer by lynnlo(4176) |
Question 732241: 1. A committee of 5 people is to be chosen from a group of 8 women and 10 men.
a. How many different committees are possible?
How many are possible if the following restrictions are enforced
b. The committee must feature both men and women?
c. The committee must feature 3 women and two men?
d. The committee must have more women than men?
I am having a hard time with these questions, all I have so far for a is:
8P5= 6720 committees from the group of 8 women
10P5= 30, 240 committees from the group of 10 men
18P5= 1,028,160 committees from both groups
Click here to see answer by lynnlo(4176) |
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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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