Maths, Addmaths and Statistics: Post your doubts here!

[Usman17]

Re: O'level Maths, Addmaths and Statistics help available he

Can some one please solve my queries in this thread or else i will be doomed... :| :S
viewtopic.php?f=25&t=8902&p=95199#p95199

 

[Dissent]

Re: O'level Maths, Addmaths and Statistics help available he

Could someone help me solve question (a) here:

EDIT: Nevermind. Figured it out; It was a simple case of the CAST diagram.

 

[ibadsiddiqi]

Re: O'level Maths, Addmaths and Statistics help available he

which year is it from

 

[Usman17]

Re: O'level Maths, Addmaths and Statistics help available he

Somebody pleaseeeeeee explain me LCM as a product of their prime factors, HCM AND HCF... PLEASEEE!!!

 

[insomniac]

Re: O'level Maths, Addmaths and Statistics help available he

<dac = -cos^a = -4/5

b)AC/sinb = 10/ sin a
25AC /24 = 10*5/ 3

AC = 16

 

[insomniac]

Re: O'level Maths, Addmaths and Statistics help available he

i duno abt hcm ... but see hcf is a product of the common factors while lcm is the product of common and uncommon factors

 

[Usman17]

Re: O'level Maths, Addmaths and Statistics help available he

EXPLAIN WID EXAMPLE PLEASE!! :O

 

[killer22]

Re: O'level Maths, Addmaths and Statistics help available he

How are u guys preparing for statistics? I mean which book or resource are u guys using???

 

[insomniac]

Re: O'level Maths, Addmaths and Statistics help available he

oka see if u r supposed to find lcm n hcf of 64 and 32 .. take da prime factors
prime factors of 32 are : 2*2*2*2*2
and prime factors of 64 are :2*2*2*2*2*2
common factors : 2*2*2*2*2
and uncommon factors : 2
hcf : product of common factors : 32
lcm common factors * uncommon factor = 32*2= 64

 

[Maleeha]

Re: O'level Maths, Addmaths and Statistics help available he

How are u guys preparing for statistics? I mean which book or resource are u guys using???

it'll be good to do a few pastpprx than searching for buks... atleast doing dat helped mee..

 

[Maleeha]

Re: O'level Maths, Addmaths and Statistics help available he

ITS URGENT..... PLEASE these are the last ten minute id be allowed on internet.. please sumone help me in q.15 (c)... http://www.xtremepapers.me/CIE/Cambridg ... 9_qp_1.pdf
it myt b simple bt i jxt cant get it this tym..

 

[Nibz]

Re: O'level Maths, Addmaths and Statistics help available he

Range is the difference between the highest and lowest values in the set of data!
The highest value here is 4 minutes (change this into seconds = 240 seconds) and the lowest is: 75 seconds
So simply find the difference = 240 - 75 = 165 seconds
Change this into minutes and seconds!
YOu will get 2 minutes and 45 seconds as your answer!

 

[Maleeha]

Re: O'level Maths, Addmaths and Statistics help available he

THANKYOU SOOOO MUCHHH......

 

[Anon]

Re: O'level Maths, Addmaths and Statistics help available he

The least time taken is in the C---D stop that is 75 seconds
The most time taken is in the A---B stop that is 4 min.

To get range if time, subtract 75 sec from 4min

240sec - 75 sec = 165sec

= 2min 45sec

 

[Anon]

Re: O'level Maths, Addmaths and Statistics help available he

Nibzy did it!!

Actually my sis got stuck on the same ques and asked me, so I knew the whole ans from like before

 

[Diamona151294]

Re: O'level Maths, Addmaths and Statistics help available he

i need urgent help! math transformation is over my head! in this paper q22 d, wt the hell does it mean????????

http://www.xtremepapers.me/CIE/Cambridg ... 5_qp_1.pdf

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

It is related to the previous part... There A is transformed to D now you have to answer when D is transformed back to A what that transformation is? Centre remains same. Difference is factor. As the image has diminished, factor is between 0 and 1... Both image an original are on either side of the enlargement centre so factor is negative...

 

[Diamona151294]

Re: O'level Maths, Addmaths and Statistics help available he

Thank soo much! the answer makes sense now... but how du know what FT(A)=A means???

 

[Diamona151294]

Re: O'level Maths, Addmaths and Statistics help available he

I have another question.
How du do do q 25 part c of this?

 

[CaptainDanger]

Re: O'level Maths, Addmaths and Statistics help available he

E(A) means A is enlarged to D... Now F(D)=A so you have to answer what F is...