Asked May 12, 2019
  1. Monica, still, takes one hour to wash a car and Bill takes two hours to wash a car.  If they work together, how long will it take them to wash one car?

Expert Answer

Step 1

Let Monica and Bill can complete the work in x hours if they work together.

Washing a car can be denoted as 100% work.

It can be said that in 1 hour Monica can complete 100% work alone.

In x hour she can complete 100x% work.

In 2 hours Bill can complete 100% work.

In 1 hour Bill can complete (100/2)% = 50% work.

In x hour he can complete 50x% work.

If they both will work together, in x hours they will complete (100x +50x)% work.

We have assumed that in x hours they both can complete the 100% work.


Step 2

Therefore, in (2/3) hour = (2/3)×60 minutes =...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Related Statistics Q&A

Find answers to questions asked by student like you

Show more Q&A add

Q: Let z=a be a positive z-score in a standard normal distribution such that the area between z=-a and ...

A: Normal distribution:A random variable X is said to follow a normal distribution if the probability d...


Q: You are the manager of a Surgi-Center that performs minor surgical cases. The Center has 5 operating...

A: The aim is to find the daily capacity of the Center in cases.Here, the time taken to perform each ca...


Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and...

A: Let r denote the linear correlation between advertising cost (x) and profit (y). The hypotheses are ...


Q: How much money do winners go home with from the television quiz show Jeopardy? To determine an answe...

A: Solution:Confidence interval formula:Confidence interval = sample statistic ± margin of errorWhere, ...


Q: Select the statistic test that best fits each description. Study exploring the relationship between ...

A: Introduction:A brief introduction to the various tests suggested here is given below:T-test independ...


Q: You are given the sample mean and the population standard deviation. Use this information to constru...

A: Confidence interval:The formula of confidence interval for the population mean when population stand...


Q: The Orchard Cafe has found that about 10% of the diners who make reservations don't show up. If 86 r...

A: The aim is to find the mean, µ, and standard deviation, σ of the binomial distribution.


Q: In general, we want to see if elderly primes will lead people to feel elderly feelings and see an ol...

A: The independent variable is that which is changed by the experimenter to test the outcome of the dep...


Q: Hospitals typically require backup generators to provide electricity in the event of a power outage ...

A: Independent events:If A and B are two independent events, the probability of the event A and B can b...