Author Topic: Latest maths notes at astarmathsandphysics.com  (Read 23002 times)

Offline astarmathsandphysics

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #30 on: October 25, 2009, 05:26:02 pm »
Olywill do

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #31 on: October 25, 2009, 07:39:19 pm »
topic is now sticky! ;)

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #32 on: November 01, 2009, 04:16:35 am »
hey have a prob in math for these type of sums....plz help..

Grade                           1 2 3 4 5 6 7
Number of students        1 2 4 7 4 8 2

Students are chosen at random, one by one, from the original 28, until the student
chosen has a grade 5.
Calculate the probability that this is the third student chosen


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Re: Latest maths notes at astarmathsandphysics.com
« Reply #33 on: November 01, 2009, 04:20:38 am »
Physics quest...

When dey say start temperature scale on Y axis at 40o...Do u start at origin or point above dat??
And wen dey say draw a circuit diagram to represent a voltmeter connected across 3 lamps how shld d dig look...Just wanted to confirm d answer for this...

Offline Ghost Of Highbury

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #34 on: November 01, 2009, 04:27:22 am »
hey have a prob in math for these type of sums....plz help..

Grade                           1 2 3 4 5 6 7
Number of students        1 2 4 7 4 8 2

Students are chosen at random, one by one, from the original 28, until the student
chosen has a grade 5.
Calculate the probability that this is the third student chosen



the probability that the 1st student does not have a grade 5 is -> 28/28 - 4-28 = 24/28

the probability that the second student does not have a grade 5 is --> 27/27 - 4/27 = 23/27

the probability that the third student HAS a grade 5 is -> 4/26

multiply them

« Last Edit: November 01, 2009, 04:41:44 am by A@di »
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Re: Latest maths notes at astarmathsandphysics.com
« Reply #35 on: November 01, 2009, 04:28:38 am »
which pastpaper/year is this q from?

and yea.. its the anser 4/26 ??
October 2007 paper 4....No, answer is 92/819

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #36 on: November 01, 2009, 04:34:08 am »
Physics quest...

When dey say start temperature scale on Y axis at 40o...Do u start at origin or point above dat??
And wen dey say draw a circuit diagram to represent a voltmeter connected across 3 lamps how shld d dig look...Just wanted to confirm d answer for this...

u put that "cracked sin curve" ka symbol between the origin and the next point (all on Y axis) and then put the point above that as 400

something like the attached one

PS : I'm not sure on this one.

and yea...the lamps are connected in parallel or series?

divine intervention!

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #37 on: November 01, 2009, 04:39:53 am »
u put that "cracked sin curve" ka symbol between the origin and the next point (all on Y axis) and then put the point above that as 400

something like the attached one

PS : I'm not sure on this one.

and yea...the lamps are connected in parallel or series?


can u do both..

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #38 on: November 01, 2009, 04:41:34 am »
u put that "cracked sin curve" ka symbol between the origin and the next point (all on Y axis) and then put the point above that as 400

something like the attached one

PS : I'm not sure on this one.

and yea...the lamps are connected in parallel or series?


nothing attached aadi
AAL IZZ WELL!!! ;)

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #39 on: November 01, 2009, 04:44:29 am »
nothing attached aadi
yea cant see anythin...

Offline Ghost Of Highbury

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #40 on: November 01, 2009, 04:47:13 am »
nothing attached aadi
oh...sry..


the temp. and parallel attached

« Last Edit: November 01, 2009, 04:58:52 am by A@di »
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Re: Latest maths notes at astarmathsandphysics.com
« Reply #41 on: November 01, 2009, 04:50:42 am »
i've shown 1 voltmeter because i assume that all three lamps are identical..

and yea..the question said a voltmeter across 3 lamps..

so is it acorss all three lamps or across 1 of them...??..

which pastpaper/year?
« Last Edit: November 01, 2009, 04:58:10 am by A@di »
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Offline Ghost Of Highbury

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #42 on: November 01, 2009, 04:51:55 am »
October 2007 paper 4....No, answer is 92/819

i edited my above answer
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Re: Latest maths notes at astarmathsandphysics.com
« Reply #43 on: November 01, 2009, 04:53:02 am »
but aadi if it says a voltmeter across 3 lamps then it should be attached parrallel to the 3 lamps together...not just 1.....i suppose!!??
AAL IZZ WELL!!! ;)

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Re: Latest maths notes at astarmathsandphysics.com
« Reply #44 on: November 01, 2009, 04:54:24 am »
somebody told me it was like this..