Questions on Logic: Finite and infinite sets answered by real tutors!

Tutors Answer Your Questions about Finite-and-infinite-sets (FREE)

Question 564074: the set of multiples of 6 between 0 and 90
Click here to see answer by stanbon(48516)

Question 555263: 26th term: 3,8,13,18
Click here to see answer by jim_thompson5910(21667)

Question 550149: Look at the series : 53,53,40,40,27,27,... what number should come next
Click here to see answer by fcabanski(385)

Question 542288:
Suppose that how a voter choses to vote (Democrat, Independent, or Republican) is a stochastic process determined by how she voted in the previous election and that the process is described by the following transition matrix.
D I R
D 0.45 0.15 0.4
I 0.4 0.35 0.25
R 0.55 0.1 0.35

Further, suppose that the voters are evenly split among the three parties in the first election. How will the voters be distributed in the second election? (give 4 decimal places)
Click here to see answer by stanbon(48516)

Question 515378: could any one help me in my homework please =)
suppose that S and T both are sets such that T subset of S then show that :
a) if S is a finite set ,then T is also finite set.
b) if T is an infint set, then S is an infinites set.
waiting your help <3 <3
Click here to see answer by drcole(72)

Question 504726: An urn contains 4 red, 5 white, and 4 blue marbles. In how many ways can three marbles be selected so that at least one of them is blue?
I've tried C(4,1) x C(9,2) + C(4,2) x C(9,1) = 198. I'm getting an "incorrect" response when I click submit.
Click here to see answer by stanbon(48516)

Question 483556: Could someone help me with this problem:
Let p represent a true statement, while q and r represent false statements. Find the truth value of the compound statement.
(p V ~q) Λ r
1. True
2. False
Click here to see answer by Tatiana_Stebko(1060)

Question 483259: Could you please help with this?
Use De Morgan’s laws to determine whether the two statements are equivalent:
∼p ∨ ∼q, ∼(p ∧ q)
Click here to see answer by Theo(2967)

Question 483261: Will someone help with this?
Determine the truth value of the statement when p is T, q is F, and r is F:
(p ∨ q) ↔ (∼r ∧ p)

Click here to see answer by jim_thompson5910(21667)

Question 476974: If two cards are drawn from a 52-card deck without replacement, in how many different ways is it possible to obtain a king on the first draw and a king on the second?
Click here to see answer by robertb(4012)

Question 476965: Find the number of different subsets of the set {8, 9, 10}.
Click here to see answer by mananth(10541)

Question 473421: Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {10, 11, 12, 13, 14, 15, 16, 17}
Click here to see answer by jim_thompson5910(21667)

Question 473182: what is trainagle

Click here to see answer by Alan3354(21555)

Question 465832: Let U = {x│x is an American}
C = {x│x is a smoker}
D = {x│x has a health problem}
E = {x│x is a male}
Describe in words a member of each of the following:
(a) ¯C¯
(b) ¯C¯ ∩ ¯D¯
(c) C ∩ D
(d) D - C
(e) D U C
NOTE: U denotes “union” , ∩ denotes “intersection” and ¯ ¯ denotes “negation”,
for example, ¯ C¯ = is not a smoker
Stumped unable to start.
Click here to see answer by solver91311(12118)

Question 459087: Let A and B be subsets of U={a,b,c,d,1,2,3,4} A={a,2}
A ∩ B = {2} and A ∪ B = {a,c,d,2,4}. Find B

Click here to see answer by Edwin McCravy(6932)

Question 458504: A pair of dice is rolled and the product of the two numbers showing is noted. How many products are possible?
Click here to see answer by Edwin McCravy(6932)

Question 458505: Construct all subsets of {a,b,c}. How many subsets are there?
Click here to see answer by richard1234(4789)

Question 458353: What is the solution to the infinite geometric series... the lower limit is = to 1. The upper limit is the infinite symbol. 0.8(0.2)^(n-1).
Click here to see answer by Edwin McCravy(6932)

Question 458354: What is the solution to the infinite geometric series... the lower limit is = to 1. The upper limit is the infinite symbol. (-2/3)^(n-1)
Click here to see answer by robertb(4012)

Question 420405: if some smaugs are thors and some thors are thrains, then some smaugs are definitly thrains.! this statement is true false or neither?
Click here to see answer by josmiceli(6778)

Question 414142: what is every number 5 combonation that can be made with numbers 1 through 99
Click here to see answer by Alan3354(21555)

Question 412051: Use the De Morgan's laws to simplify the expression:
(S'union T')'
Click here to see answer by Edwin McCravy(6932)

Question 407323: {All multiples of 5 greater than 29}
Click here to see answer by MathLover1(3376)

Question 385701: what is infinity*infinity

Click here to see answer by richard1234(4789)

Question 385701: what is infinity*infinity

Click here to see answer by user_dude2008(1825)

Question 348244: Identify n(S) for the given set: S={f, h, n, t}
Click here to see answer by jim_thompson5910(21667)

Question 344969: The difference of two integers is 46.If the larger integer is twice the smaller.Find the integers
Click here to see answer by jsmallt9(2063)

Question 315210: If 300 jellybeans cost you x dollars. How many jellybeans can you purchase for 50 cents at the same rate?
Click here to see answer by malaydassharma(59)

Question 305771: the base of a swimming pool is a circle of radius of 3 m
find its area correct to two decimal place

Click here to see answer by themathtutor2009(81)

Question 303205: I am not sure if I am asking the right person (or section), but I posted my question on an image hosting site: http://i39.tinypic.com/2n7154w.jpg . It has something to do with "catenary" stuff. Can you help, please?
Click here to see answer by Fombitz(13823)

Question 300874: A credit card company classifies its consumers in a given month in three groups; nonusers, light users, and heavy users. The transition matrix for these states is
Nonuser Light Heavy

Suppose the initial distribution for the three states is [0.4 0.4 0.2]. Find the distribution after each of the following periods.
(a) 1 month
(b) 2 months
(c) 3 months
(d) What is the long-range prediction for the distribution of users?

Click here to see answer by Fombitz(13823)

Question 279325: what set is a subset of every set?
Click here to see answer by jim_thompson5910(21667)

Question 274180: If each score in a set of test scores is divided by 10, describe the effect of the division on the mean, median, mode, range, and standard deviation of the set.
Click here to see answer by solver91311(12118)

Question 258083: What is the set builder notation for the following?
D = (5, 10, 15, 20, . . .)
Express in set builder notation.
Click here to see answer by drk(1908)

Question 251233: In a sample of size n=50 and the proportion that responded favorably is .4. Find the standard error.
Click here to see answer by drk(1908)

Question 251235: A marketing advisory service wants to estimate the proportion of the population that responds favorably to a new product. It wants the estimate to be correct within 4% at the 95% confidence level. How big of a sample should they take?

Click here to see answer by Theo(2967)

Question 251238: A teacher gives a test and gets normally distributed results with a mean of 50 and a standard deviation of 10. If the top 10% will receive an A and the bottom 10% will receive an F, find the minimum score for a letter grade of A and the maximum score fo the letter grade of F.

Click here to see answer by Theo(2967)

Question 251231: The heights of American men aged 18 to 24 are approximately normally distributed with mean 68 inches and standard deviation 2.5 inches. Only about 5% of young men have heights outside which range?
Click here to see answer by edjones(7311)

Question 230930: In how many ways can 5 people be chosen and arranged in a straight line, if there are 11 people from whom to chose?
I tried 11 x 5 to get the answer 55 but I am thinking that is the wrong way to solve this problem. Thank you.
Click here to see answer by Alan3354(21555)

Question 218968: find the greatest common factor of 16 and 20
Click here to see answer by stanbon(48516)

Question 209133: is the greates two diget number an odd number or an even number how do you know?
Click here to see answer by stanbon(48516)

Question 209133: is the greates two diget number an odd number or an even number how do you know?
Click here to see answer by Alan3354(21555)

Question 208033: Find the sum of each of the following infinite series. If a series does not have a sum write "no sum" as the answer.
1/2+1+2+4
I know that to solve thisyou just put S=A/1-R (A= first term, R= ratio) yet I dont get how I should do it with the fraction 1/2 (I know it sounds stupid but I dont get how to solve it when it starts with a fraction =/)
Click here to see answer by rapaljer(4551)

Question 206370: 20 The population of a small country increases according to the function B=900,000e0.03t, where T is measured in years. How many people will the country have after 4 years
a.828,737
b.1,014,747
c.1,186,431
d.1,908,237
Click here to see answer by stanbon(48516)

Older solutions: 1..45, 46..90, 91..135