# XYZ

Most popular questions and responses by XYZ
1. ## math

A shopkeeper bought pens at a rate of 12 pens for 150 rs and sold them at rate of 10 pens for 130rs.The number of pens he should sell to earn a net profit of 20rs is?

asked on November 22, 2017
2. ## Physics

two charges of 40 microc and -20 micro c are placed at a certain distance apart. they are touched and kept at the same distance.the ratio of their initial to the final force between them is

asked on November 9, 2016
3. ## Statistics

Suppose that in the city in which the survey is conducted, 50% of adults are married, 15% are single, 25% are divorced, and 10% are widowed. a. Assign probabilities to each simple event in the sample space. b. Which approach did you use in part (a)? Find

asked on February 4, 2016
4. ## science

what is the reaction between hexane & iodine?

asked on May 11, 2010
5. ## Math Probability

Let X and Y be independent random variables, each uniformly distributed on the interval [0,2]. Find the mean and variance of XY. E[XY]=   var[XY]= Find the probability that XY≥1. Enter a numerical answer. P(XY≥1)=

asked on May 20, 2014
6. ## math

The ratio of Jim’s money to Peter’s money was 4 : 7 at first. After Jim spent half of his money and Peter spent \$60, Peter had twice as much money as Jim. How much money did Jim have at first?

asked on March 3, 2017
7. ## Chemistry

A toothpaste contains 0.220 % by mass sodium fluoride used to prevent dental caries and 0.32 % by mass triclosan C12H7Cl3O2, an antigingivitis agent. One tube contains 119 g of toothpaste. How many fluoride ions, F−, are in the tube of toothpaste? How

asked on November 27, 2015
8. ## Physics

A block of mass m1 is on top of a block of mass m2. Block 2 is connected by an ideal rope passing through a pulley to a block of unknown mass m3 as shown. The pulley is massless and frictionless. There is friction between block 1 and 2 and between the

asked on June 22, 2013
9. ## math

A shopkeeper allows a discount of 10% on the marked price of a commodity which he bought at 540rs.Had he sold at marked price,he would have made a profit of 210rs.what is present sp of a commodity? ans(675rs)

asked on November 22, 2017
10. ## Statistics

A survey asks adults to report their marital status. The sample space is S = {single, married, divorced, widowed} . Use set notation to represent the event the adult is not married. This is what I think is the answer Married = {single, divorced, widowed}

asked on February 3, 2016
11. ## math

Today,aditi is as old as barkha will be 9 yr from now.5 yrs ago,aditi was 1.5 times as old as barkha was at that time.what will be the sum of ages of aditi and barkha 4 yr hence?

asked on September 20, 2017
12. ## physics

Two construction workers each of mass m raise themselves on a hanging platform using pulleys as shown above. If the platform has a mass of 0.5m, the initial distance between the pulleys and the platform is d, and the workers each pull with a force f on the

asked on June 22, 2013
13. ## Algebra

A red ribbon is 2x cm long. A blue ribbon is 3 times long as the red ribbon. What is the total length of the ribbon?

asked on February 23, 2016
14. ## chemistry

how to balance this partial equation given below k2cr2o7+h2so4+kI-->k2so4+cr2(so4)3+h2o+I2

asked on May 12, 2015
15. ## math

A shop-keeper sells onions at Rs 24, Rs 30 and Rs 42 a kilogram, selling the different kinds in quantities proportional to 1: 1: 3. If the total quantity sold be 60 kg, the average price obtained for each kg is:

asked on November 22, 2017
16. ## chemistry

how to balance this partial equation given below k2cr2o7+h2so4+kI-->k2so4+cr2(so4)3+h2o+I2

asked on May 12, 2015
17. ## Maths Probability

Let θ be an unknown constant. Let W1,…,Wn be independent exponential random variables each with parameter 1. Let Xi=θ+Wi. What is the maximum likelihood estimate of θ based on a single observation X1=x1? Enter your answer in terms of x1 (enter as

asked on May 20, 2014
18. ## Maths Probability

Consider a Markov chain X0,X1,X2,É described by the transition probability graph shown below. The chain starts at state 1; that is, X0=1. 1recurs p=.75 1to 2 p= .25 2to 1 p = .375 2 recurs p=.25 2 to 3 p = .375 3 to 2 p = .25 3 recurs p = .75 Find the

asked on May 20, 2014
19. ## physics

calculate the maximum increase in photon wavelength that can occur during Compton Scattering. (answer in pm).

asked on July 7, 2010
20. ## PHYSICS

QUIZ 1 AND 2, PROBLEM 3 A block of mass M is pulled with a rope that exerts a force of a magnitude F, causing it to slide over horizontal ground with kinetic coefficient of friction μ (use "mu" when you input your answer). The force is applied at angle θ

asked on June 29, 2013
21. ## Statistics

A school is running a raffle. There are 100 tickets, of which 3 are winners. You can assume that tickets are sold by drawing at random without replacement from the available tickets. Teacher X buys 10 raffle tickets, and so does Teacher Y. Find the chance

asked on April 25, 2013
22. ## math

A,B,C contract a work for 1020.together A and B are supposed to do 9/17 of work.how much C get? ans 480rs

asked on November 24, 2017
23. ## physics

Stuck on this homework problem, any help would be appreciated. Thank you!! A truck has 5.9L diesel engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression

asked on May 5, 2014
24. ## Physics

The cylindrical bar in the figure has a total length L=1.2 m, a diameter d=15 mm, and is confined by fixed supports at the walls A and B. A concentrated axial load FC=30 kN is applied to the bar at point C as indicated in the figure, with LAC>LBC. The bar

asked on May 11, 2013
25. ## pre cal

how do you solve f(x)= G(X) and find the points of intersection of the graphs of the 2 functions f(x)= x^2 + 5x+ 13 g(x)= 19

asked on October 26, 2011
26. ## math

(a) Mr. Smith divides a sum of money between his three children Alex, Billy and Charlie in the ratio 3 : 2 : 7. If Charlie received \$120 more than Alex, how much money did Billy receive?

asked on March 3, 2017
27. ## Algebra

Express in mathematical form using two variables(x,y) the sum of the numerator and the denominator of a fraction is greater by 1 than thrice the numerator

asked on February 5, 2016
28. ## Math Finance

We have two independent investments. Each of them may have a 1% chance of a loss of 10 million dollars, a 2% chance of a loss of 5 million, a 3% chance of a loss of 1 million, and a 94% chance of a profit of 1 million. (Express all the following answers in

asked on May 20, 2014
29. ## pre cal

how do you solve f(x)= G(X) and find the points of intersection of the graphs of the 2 functions f(x)= x^2 + 5x+ 13 g(x)= 19

asked on October 26, 2011
30. ## ABC

BusinessWeek, in an article dealing with management, wrote, “When he took over the furniture factory three years ago…[the manager] realized almost immediately that it was throwing away at least \$100,000 a year worth of wood scrap. Within a few weeks,

asked on January 18, 2010
31. ## math

A piece of cloth is sold for rs85.80 at a profit of 30%. if it had been sold at rs 7.50 per m ,the profit would have been rs 16.50.the length of the piece is ?

asked on November 22, 2017
32. ## math

Smokers. A life insurance company found that among its last 200 claims, there were six dozen smokers. What is the ratio of smokers to nonsmokers in this group ...

asked on March 26, 2017
33. ## math

You bought two varieties of rice, costing 5 cents per ounce and 6 cents per ounce each, and mixed them in some ratio. You then sold the mixture at 7 cents per ounce, making a profit of 20 percent. What was the ratio of the mixture?

asked on March 3, 2017
34. ## algebra

10x-5x*4x=?

asked on August 21, 2011
35. ## math

when price of article was decreased by 12%, 2 more articles could be bought for rs2160.find original price of article?

asked on November 22, 2017
36. ## math

points] Two alloys A1 and A2 are composed of two basic elements. The ratios of the compositions of the two basic elements in A1 and A2 are 5 : 3 and 1 : 2, respectively. A new alloy is formed by mixing the two alloys A1 and A2 in the ratio 4 : 3. What is

asked on March 3, 2017
37. ## math

(b) If I give you \$40 then the ratio of my money to yours is 4 : 5. On the other hand, if you give me \$40, then the ratio is 8 : 1. How much money do both of us have?

asked on March 3, 2017
38. ## physics

Imagine a boat is being rowed upstream where v1 is the velocity of the boat and v2 is the velocity of the stream. What is the time required if the boat tends to cross the river along the shortest path?

asked on October 8, 2016
39. ## Maths

if area of rectangular plot is 1250 sq cm. a smaller rectangular plot with area 1/5 of the total area and length is 7 times of its breath, find the perimeter of the smaller plot

asked on October 2, 2015
40. ## math

car m takes 5hr to travel from point a to b.it would have taken 6 hr,if same car had travelled the same distance at a speed which was 15km/hr less than its original speed.what is distance between a and b ? (ans 450 km)

asked on November 20, 2017
41. ## math

if X:Y =A:B show that Y:B=(X+Y):(A+B)

asked on March 26, 2017
42. ## math

If x : y = a : b, prove that x : y : (x + y) = a : b : (a + b)

asked on March 3, 2017
43. ## math

The ratio of marks obtained by Ashpreet and Bhupinder on an exam is 6 : 5. If the combined average of their percentage scores is 68.75%, and the sum of their marks is 275, what was the exam out of?

asked on March 3, 2017
44. ## Finance

Select the right statement(s). A coherent measure of risk is: Sub-additive Possibly Homogeneous Translation Invariant Concave Monotone

asked on May 20, 2014
1. ## science

How fool completely wrong answer you confused more than before you idiot If u don't know how to solve don't post the solution bloody hell

posted on October 20, 2018
2. ## physics

Thanks

posted on August 21, 2018
3. ## math

sir could you please explain this problem

posted on November 24, 2017
4. ## math

thanku mam

posted on November 22, 2017
5. ## math

Mam, answer 120.But i dont know...

posted on November 22, 2017
6. ## math

thanku

posted on November 22, 2017
7. ## Math Really Hard

this is wrong

posted on May 11, 2017
8. ## physics

posted on December 17, 2016
9. ## Algebra

140

posted on November 4, 2016
10. ## math

Does anyone know the answer

posted on July 6, 2015
11. ## chemistry

ghnftght ftg4rgt rtfr4f few4tfr vrhy6hh nrhrgbfbgtr5y5n bhbt56yht

posted on May 11, 2015
12. ## Maths Probability

6. 34/120

posted on May 20, 2014
13. ## Probability

1. 0.125 2. 1/8 3. ??? 4. 0.0608 5. 1/8 6. ???

posted on May 20, 2014
14. ## Maths Probability

1. 0.125 2. 1/8 3. ??? 4. 0.0608 5. 1/8 6. ??? Any help?!

posted on May 20, 2014
15. ## Probability

anyone? Im badly stuck on this :(

posted on March 9, 2014
16. ## Physics Classical Mechanics

sorry b)

posted on November 10, 2013
17. ## Physics Classical Mechanics

c)

posted on November 8, 2013
18. ## physics

thank u very much elena ..that was a great help..! :)

posted on October 7, 2013
19. ## chemistry

convert the solubility to Moles per Litre.

posted on December 20, 2012
20. ## chem

thnaks...

posted on March 9, 2012
21. ## chem

Is the concentration of A^- just 0.079 then?

posted on February 22, 2009
22. ## English

nice anwer

posted on January 4, 2009