Mathematics: Post your doubts here!

[mikail]

You will get EFC if you must use the answer of a particular part to answer the next parts...

 

[mikail]

If the question is for 15 Marks, there will definitly be EFC marks.

 

[Madiez]

Hey guys I gave my paper 4 exam variant 42 a few days ago. I have made a huge mistake in my paper. instead of multiplying the probabilities i have added them. so can i get E.C.F (error carried forward) in the question. The whole question was of 15 marks. I am extremely sad. I got a bit confused between the mutually exclusive and independent events.

I don't think they will give you a mark on ECF for such a mistake. This will be considered a lack of preparation, or lack of understanding for your question.
Don't worry, though. It will be fine, IsA.

 

[gingerale3]

papers.xtremepapers.com/CIE/.../0580_s10_qp_21.pdf‎

can I get help on number 17 PLEASSEEE???? I don't know how to get b) or c) ?

 

[gingerale3]

papers.xtremepapers.com/CIE/.../0580_s10_qp_21.pdf‎

can I get help on number 17 PLEASSEEE???? I don't know how to get b) or c) ?
ANYBODY???? im new to this and I REALLY need help!!

 

[transformer629]

papers.xtremepapers.com/CIE/.../0580_s10_qp_21.pdf‎

can I get help on number 17 PLEASSEEE???? I don't know how to get b) or c) ?

link not working

 

[gingerale3]

lol sorry http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_21.pdf

 

[***amd***]

papers.xtremepapers.com/CIE/.../0580_s10_qp_21.pdf‎

can I get help on number 17 PLEASSEEE???? I don't know how to get b) or c) ?
ANYBODY???? im new to this and I REALLY need help!!

ii)
triangle BOC is an isoceles cuz OC and OB are the radii of the circle and thus OC = OD... thus angle OCB = OBC
line EC is perpendicular to OD, and EC is parallel to AB, by applying the alternate angle property we get angle DOB = 90
so 90 = DOB = DOC + COB
90 = 38 + BOC
BOC = 90 - 38
BOC = 52

BOC + CBO + BCO = 180
as BCO = CBO

52 + CBO + CBO = 180
2.CBO = 180 - 52
CBO = 128/2
CBO = 64

iii)
COD and CED are extended from the same segment.
so COD = 2.CED = 38
CED = 38/2 =19

EDO + CED + 90 = 180
you can simplify and get the answer.
EDO = 71

 

[gingerale3]

you LIFESAVER! thank you so much!!!!

 

[transformer629]

you LIFESAVER! thank you so much!!!!

You are welcomed !

 

[***amd***]

you LIFESAVER! thank you so much!!!!

hey dont say that! infact life is in the hands of Allah
well u r welcome.

 

[gingerale3]

not you -.- haha

 

[Mahmood Magdy]

Hey people ! I need help on mensuration
0580/42/MJ/11 Q7 part d

 

[Fayax555]

you LIFESAVER! thank you so much!!!!

not you -.- haha

Well, you should quote the message if you're replying.

 

[Nabeel.Ahmad]

Lol, What the hell is that? ^^

 

[Fayax555]

Lol, What the hell is that? ^^

First it was 188 pages. After i did that, the pages increased to 189. When I undo what I did, the pages still remains 189 and it didn't decrease.

 

[SecSea]

Hey ummm I take extended Mathematics and if you can give me the pastpaper question for each chapter accordingly For example : Chp 1 ( June 2007 pp2 q6) like that but for all the chapters I would appreciate it

 

[Ahmed Qassim]

I need help.I have exam tomorrow!!I need help in m/j 2006 q17.Help fast how do we do it??????

 

[Fayax555]

I need help.I have exam tomorrow!!I need help in m/j 2006 q17.Help fast how do we do it??????

which paper?

 

[Ahmed Qassim]

2