Mathematics: Post your doubts here!

[Shada Mohammed]

There are 9 pencils, so there are 9C2 = 9x8/2 = 36 ways to pick 2 pencils.
To get exactly 1 green pencil, there is 1 green and 1 other.
Raj picks from 4 green and 5 others.
There are 4 ways to pick one green and 5 ways to pick the other.
4x5 = 20 ways to pick exactly 1 green
20/36 = 5/9

What is 9c2?

 

[Thought blocker]

What is 9c2?

9combination2

 

[Faiza Anwar]

OMG this question had come in our exams and i loved it

See, throughout, we apply the principle that Volume = Area * length ( whatever length of cross-section... ), and step-by-step, we find each of the variables for both the containers.

For the large container, we have the volume and area, so let's find its length-
Volume = area * length
3456 = 1024 * length
length = 3.375 cm

For the smaller container, we will first find its length in order to get its area, by comparing its values with the bigger shape as they both are similar.
Using the formula V1/v2 = (length1/length2)^3, we substitute (the formula is somewhat that, i don't know how you write it)
3456/1458 = (3.375/length2)^3
length2 = 2.53125 (don't cut off decimal numbers even after three decimal places. Use the calculator to work out the answer)

Now you have the length as well as the volume for the smaller container,
Volume = area * length
1458 = area * 2.53125
area = 576

Erm... i hope you got it :/

thankyou so much!! i loved the way u explained it.. may u get good grades inshaAllah. good luck!

 

[Faiza Anwar]

M/J 2012 p22.. Q2, Q18a and Q19. plzz help me with these questions....

 

[Faiza Anwar]

can anyone please help me with this question?...part b

5^y =k
so in 5^y+1, write k in place 5^y and then +1 so it will be k^+1, thus its k^1+1 which is k^2 is this the write answer? hope it is.. or is it (k+1)?

 

[Shada Mohammed]

9combination2

Sorry but I haven't seen this rule before I mean from where did you get the 9×8/c

 

[Thought blocker]

Sorry but I haven't seen this rule before I mean from where did you get the 9×8/c

Use your scientific calc nstead!

 

[<--h-->]

5^y =k
so in 5^y+1, write k in place 5^y and then +1 so it will be k^+1, thus its k^1+1 which is k^2 is this the write answer? hope it is.. or is it (k+1)?

thanks alot but the correct answer is 5k.

 

[Faiza Anwar]

thanks alot but the correct answer is 5k.

oh then how to do it??

 

[<--h-->]

M/J 2012 p22.. Q2, Q18a and Q19. plzz help me with these questions....

hope u get it...

 

[Faiza Anwar]

hope u get it...

thanks a bunch can u help me with the other questions as well??

 

[<--h-->]

M/J 2012 p22.. Q2, Q18a and Q19. plzz help me with these questions....

here u go..19th question

 

[snowbrood]

can anyone please help me with this question?...part b

well use the principles of indices to sort it out
5^y=k
=so 5^(y+1)
=(5^y)*(5^1) (1 is obvious but just to clear some stuff)
=k*5
=5k

 

[fire wall]

AsSalamoAlaikum Wr Wb...

Stuck somewhere in Maths?? Post your queries here! Members around will help you InshaAllah.

NOTE: If you have any doubt in the pastpper questions, then kindly post the link to the paper!

May Allah give us all success in this world as well as the HereAfter...Aameen!!

SEQUENCES-Points to remember:
Many people find it hard, but to be honest it's just more of logic..that's all!

Sequences!

Using log for indices.

I am not able to solve&understand locus in any of pastpaper questions.please send me some videos or explanation to understand.
please do answer fast my exam is on 29-10-2014 early in the morning.
URGENT REQUEST PLEASE!

 

[Glennn]

Hey! To everyone who is doing their paper tomorrow
Good Luck!
Maybe after you guys finished the paper you could tell me how difficult the paper was so that I can prepare it mentally ><
I'm having my paper tomorrow as well

 

[fire wall]

anybody here to bother & answer me in this final moment
Does anybody who has done this paper & have tips or anything for this OCT/Nov 2014 maths core variant 12 please send it to me on [email protected]

 

[Faiza Anwar]

here u go..19th question

thankyou veryyyyyyy much this was so helpful. and i hope you'll be there if i need more help... can u plzz tell me that what is the rotational symmetry of the letter O and why is the answer in Q 2a not O and I?

 

[fire wall]

thankyou veryyyyyyy much this was so helpful. and i hope you'll be there if i need more help... can u plzz tell me that what is the rotational symmetry of the letter O and why is the answer in Q 2a not O and I?

Q is curved letter & I is not

 

[Thought blocker]

anybody here to bother & answer me in this final moment
Does anybody who has done this paper & have tips or anything for this OCT/Nov 2014 maths core variant 12 please send it to me on [email protected]

Don't ask paper dude. I just gave my laptop to my brother and I had good notes in that. Unfortunately he left the home, else I would had stopped him. You are very late and I am shocked you are telling this a day before your exam. Lol! And yeah don't ask for papers here dear don't try na cheat do what u know else leave it. Re sit for your math exam n prepare well n score good.

All the best mate.

 

[Thought blocker]

thankyou veryyyyyyy much this was so helpful. and i hope you'll be there if i need more help... can u plzz tell me that what is the rotational symmetry of the letter O and why is the answer in Q 2a not O and I?

Which question?
The letter O could have order 2 if the O is elongated or order infinite if the O is circular.