All categories

3 years ago

The price of a washing machine was decreased by 20% to £640.

Mathematics

1 answer:

pickupchik [31]3 years ago

5 0

Answer:

£800

Step-by-step explanation:

Use the percentage formula: NV = m x OV

NV is New Value;

m is Multiplier;

and OV is Old Value.

£640 in the New value, so now we have to convert 20% to a multiplier and find out the Old value.

Make OV the subject of the formula: OV = NV / m

So 20% decrease would mean: 100 - 20 = 80 * 100 = 0.80

Divide 640 (NV) by 0.80 (m) and it will give you:

£800

And it would make sense that the OV is higher, and it matches the statement -> as the NV is the decrease.

You might be interested in

In a market economy, if the price of a good increases, the quantity demanded by consumers and the quantity supplied by producers

love history [14]

The correct answer is A hope this helps

3 0

4 years ago

A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distrib

DiKsa [7]

Answer:

The fraction or percentage of the applicants that we would expect to have a score of 400 or above is 77.34%

Step-by-step explanation:

Scores are normally distributed with a mean of 460 and a standard deviation of 80. For a value x, the associated z-score is computed as $z = \frac{x-460}{80}$ , therefore, the z-score for 400 is given by $z_{0} = (400-460)/80 = -0.75$ . To compute the fraction of the applicants that we would expect to have a score of 400 or above, we should compute the probability P(Z > -0.75) = 0.7734, i.e., the fraction or percentage of the applicants that we would expect to have a score of 400 or above is 77.34%

8 0

4 years ago

V. Money Magazine reported that the average price of gasoline in the United States during the first quarter of 2008 was $3.46. A

Butoxors [25]

Answer:

$z=\frac{3.43 -3.46}{\frac{0.15}{\sqrt{30}}} = -1.095$

$z=\frac{3.49 -3.46}{\frac{0.15}{\sqrt{30}}} = 1.095$

And we can find this probability using the normal standard table and we got:

$P(-1.095$

Step-by-step explanation:

Let X the random variable that represent the price of a population, and for this case we know the distribution for X is given by:

$X \sim N(3.46,0.15)$

Where $\mu=3.46$ and $\sigma=0.15$

And for this case we want to find the following probability:

$P(3.43 \leq \bar X \leq 3.49)$

And we can use the z score formula given by:

$z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

If we find the z score for the limits we got:

$z=\frac{3.43 -3.46}{\frac{0.15}{\sqrt{30}}} = -1.095$

$z=\frac{3.49 -3.46}{\frac{0.15}{\sqrt{30}}} = 1.095$

And we can find this probability using the normal standard table and we got:

$P(-1.095$

8 0

4 years ago

What are the solutions to the system of equations?

fomenos

Answer:

Step-by-step explanation:

y=0^2-5x0+6=0+0+6=6

y=-4x0+6=0+6=6

y=1-5+6=2

y=-4+6=2

6 0

4 years ago

Read 2 more answers

There are five puppies in a litter. If the probability that a puppy is male is 0.5, what is the probability that at most one pup

atroni [7]

I believe C. 0.5 because if the probability that 1 puppy is a male and they are asking what is the probability is that at most one would be male that would seem as the same as saying one male puppy has a 0.5 probability. Hope it help and isn't confusing how I worded it.

8 0

3 years ago