All categories

3 years ago

What fraction of two pounds is twenty pence

Mathematics

1 answer:

Y_Kistochka [10]3 years ago

4 0

<span>20 p/2 pounds = 20p/200p = 1/10</span>

You might be interested in

Susan enlarged a rectangle with a height of 6 cm and length of 13 cm on her computer. The length of the new rectangle is 19.5 cm

amid [387]

On enlarging the rectangle, the proportion or ratio of Length to Height will stay the same.

The ratio of original length to height is 13 : 6
The ratio in enlarged rectangle will stay the same. Let the height of enlarged rectangle is y cm. So we can write:

$13:6=19.5:x \\ \\ 
 \frac{13}{6} = \frac{19.5}{x} \\ \\ 
x=19.5* \frac{6}{13}=9$

Therefore, the height in enlarged rectangle will be 9 cm

5 0

3 years ago

About 1/5 of all adults in the United States have type O blood. If four randomly selected adults donate blood, find the probabil

OlgaM077 [116]

Answer:

We know that:

1/5 = 0.2 of all adults in US have type O blood.

Then: 4/5 = 0.8 of all adults in US do not have type O blood.

a) All four are type O.

Let's think this, as four events with two possible outcomes, having type O blood, with a probability of 0.2, and not having type O blood with a probability of 0.8

Now if we want the four people to have type O blood, then we have the outcome with probability 0.2 four times, and as we know, the joint probability is equal to the product of the individual probabilities:

P =0.2^4 = 0.0016

b) None of them is type O.

Similar to the above case, but this time we work with four times the probability 0.8

P = 0.8^4 = 04096

c) Two of the four are type O.

Here we will have two times the probability 0.2, and two times the probability 0.8.

p = 0.2^2*0.8^2

But, if the people is ordered, the two persons with type O blood can be:

first and second

first and third

first and fourth.

second and third

second and fourth

third and fourth.

6 different combinations, then the actual probability for this case will be:

P = 6*p = 6*(0.2^2*0.8^2) = 0.1536

8 0

3 years ago

Equation Editor Solve -32= -1db for b.

olga nikolaevna [1]

Answer:

1+1=2

2+2=4

4+4=8

8+8=16

6 0

3 years ago

2/7 in rational number line

solong [7]

Step-by-step explanation:

The fraction 2/7 is a rational number. A rational number is one that can be expressed as a fraction or ratio between two integers (whole numbers).

8 0

3 years ago

Use your knowledge about parentheses and substitution to solve the following:

Mekhanik [1.2K]

Answer:

3x+y

Step-by-step explanation:

5 0

3 years ago