Is my maths right?

Conrad11

Conrad11

Conrad11

Soldato
Joined
12 Jun 2005
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God, this seems so blimming simply but i think i have done it wrong.

If I had event A happening 100 times and event B happening 100 times.

And the percentage of A was 55% and the percentage of B was 45%. (of another variable)

If I wanted to change the results of how much event a was happing from 55% to 50% and event B to 50%.

Would this be right

event A happening = (100 / 55) *50
event B happening = (100 / 45) *45

.....this sounds really confusing i know....

Can anyone understand?

EDIT:

Ok erm, for instance:

If there the word "man" and the word "woman" was mentioned 100 times each in a book.

And the percentage of males was 55% and the percentage of females was 45%.

Assuming there is a link between two things (eg males linked to the word man..etc..).

If I was actually 50:50 males to females, how would the number of times the word "man" and "woman" be affected.
 
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I don't really understand what you are asking. When you mean Event A happening 100 times, you mean it occured 100 times? Like you rolled a 4 on a die 100 times?

But then you have the percentage of A and B?!?

If you clarify i should be able to help
 
55% of the time A is happening, therefore:

55% of A is 100.

To get to 100% of A, you need to divide 100 by 55%:

100/0.55 = 182 (to 0 decimal places)

To get to 50% of A, you then multiply 182 by 50%

182 * 0.5 = 91 (to 0 decimal places).



Remember, 55% is not 55, you need to use 0.55.
 
Ok erm, for instance:

If there the word "man" and the word "woman" was mentioned 100 times each in a book.

And the percentage of males was 55% and the percentage of females was 45%.

Assuming there is a link between two things (eg males linked to the word man..etc..).

If I was actually 50:50 males to females, how would the number of times the word "man" and "woman" be affected.
 
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Sorry for my sluggish replies, lady troubles!

So this is my interpretation: When loading people onto plane it was found that by loading 100 people into the rear and 100 people in the front, the weight was distributed 55% over the rear wheels and 45% over the front.
How many people should be loaded onto the rear and front to divide the weight 50-50?

That is your question, yes?


But do you want the same total? Ie 200 people?
 
Conrad11 said:
God, this seems so blimming simply but i think i have done it wrong.

If I had event A happening 100 times and event B happening 100 times.

And the percentage of A was 55% and the percentage of B was 45%. (of another variable)

If I wanted to change the results of how much event a was happing from 55% to 50% and event B to 50%.

Would this be right

event A happening = (100 / 55) *50
event B happening = (100 / 45) *45

.....this sounds really confusing i know....

Can anyone understand?

EDIT:

Ok erm, for instance:

If there the word "man" and the word "woman" was mentioned 100 times each in a book.

And the percentage of males was 55% and the percentage of females was 45%.

Assuming there is a link between two things (eg males linked to the word man..etc..).

If I was actually 50:50 males to females, how would the number of times the word "man" and "woman" be affected.
Click to expand...

Eh?

What do you mean "and the percentage of males was 55% and the percentage of females was 45%"?

If what was actually 50:50 males to females? Are you talking about a statistical distribution and the probability of getting 50 males and 50 females from a sample of 100 given the probability of getting each male and female is 0.55 and 0.45?

What is it you want to know?:confused:
 
Monkey Puzzle said:
What is it you want to know?:confused:
Click to expand...

Where to put the people on the plane ;)

OSB said:
So this is my interpretation: When loading people onto plane it was found that by loading 100 people into the rear and 100 people in the front, the weight was distributed 55% over the rear wheels and 45% over the front.
How many people should be loaded onto the rear and front to divide the weight 50-50?
Click to expand...
 
55% - 45% = 10% - the difference in value between both sides

10 / 2 = 5% - this is the amount of change both sides has to have (5% more on 1 side, 5% less on the other) so that they are equal

200 / 100 = 2 - this is the value of 1%

2 * 5 = 10 people - this is 5%

So: Take 10 people from the rear of the 'plane, and move them to the front: leaving 90 at the rear, and 110 at the front.

.... right?
 
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