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Author Topic: S1 and S2 DOUBTS HERE!!!!  (Read 63712 times)

Offline Blizz_rb93

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Re: S1 DOUBTS HERE!!!!
« Reply #30 on: May 22, 2010, 09:23:34 am »
Quote from: Engraved on May 22, 2010, 09:22:45 am
i will post it soon

and yes you will be given it
Okay then :) thank you :D
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Offline T.Q

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Re: S1 DOUBTS HERE!!!!
« Reply #31 on: May 22, 2010, 01:36:30 pm »
need help in this question


jan 08

Q3
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Offline Saladin

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Re: S1 DOUBTS HERE!!!!
« Reply #32 on: May 22, 2010, 02:25:01 pm »
Quote from: T.Q on May 22, 2010, 01:36:30 pm
need help in this question


jan 08

Q3

I'm on it now.
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Offline Saladin

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Re: S1 DOUBTS HERE!!!!
« Reply #33 on: May 22, 2010, 02:47:37 pm »
Quote from: T.Q on May 22, 2010, 01:36:30 pm
need help in this question


jan 08

Q3

First you have to calculate the area under the bars.

(1*6)+(1*7)+(4*2)+(2*6)+(3*5.5)+(5*2)+(3*1.5)+(12*0.5)

=70

Therefore, now calculating the number of people per unit area.
\frac{140}{70}=2

Work out the area in the interval given.

0.5*12*

6*2

12
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Offline T.Q

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Re: S1 DOUBTS HERE!!!!
« Reply #34 on: May 22, 2010, 04:09:52 pm »
Quote from: Engraved on May 22, 2010, 02:47:37 pm
First you have to calculate the area under the bars.

(1*6)+(1*7)+(4*2)+(2*6)+(3*5.5)+(5*2)+(3*1.5)+(12*0.5)

=70

Therefore, now calculating the number of people per unit area.
\frac{140}{70}=2

Work out the area in the interval given.

0.5*12*

6*2

12

thanx:)
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Offline solo_G

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Re: S1 DOUBTS HERE!!!!
« Reply #35 on: May 23, 2010, 06:59:41 am »
Quote from: Freaked12 on May 21, 2010, 05:06:58 pm
P(x=n)<0.05
= (0.75)^n<0.05

take log on both sides
log(0.75)^n<log(0.05)
nlog(0.75)<log(0.05)
n(-0.28768)<-2.99573
when we convert negative to positive the inequality reverses
n>2.99573/0.28768
n>10.4134
n>11
thanx freaked!! hehehe nice nickname!! ;D +1 rep  ;D :D
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Offline solo_G

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Re: S1 DOUBTS HERE!!!!
« Reply #36 on: May 23, 2010, 07:02:05 am »
aight people anotha Qs  ;D
its from nov 09 varient 1
find how many numbers between 5000 and 6000 can be formed from the digits 1,2,3,4,5,6 if  repition of digits is allowed......i dnt get why is it 6 to da powr of 3? ??? ??? ??? >:(
« Last Edit: May 23, 2010, 07:49:00 am by solo_G »
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Offline astarmathsandphysics

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Re: S1 DOUBTS HERE!!!!
« Reply #37 on: May 23, 2010, 07:32:23 am »
must start with 5 then there are three other digits from a choice of 5 so 5*4*3
this is in the ms. You are looking at the wrong answer
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Offline solo_G

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Re: S1 DOUBTS HERE!!!!
« Reply #38 on: May 23, 2010, 07:48:30 am »
Quote from: astarmathsandphysics on May 23, 2010, 07:32:23 am
must start with 5 then there are three other digits from a choice of 5 so 5*4*3
this is in the ms. You are looking at the wrong answer
oh sorry sir i meant for the second question.........if reptitions ARE allowed....thanks
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Offline immortal

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Re: S1 DOUBTS HERE!!!!
« Reply #39 on: May 23, 2010, 09:48:54 am »
Quote from: solo_G on May 23, 2010, 07:02:05 am
aight people anotha Qs  ;D
its from nov 09 varient 1
find how many numbers between 5000 and 6000 can be formed from the digits 1,2,3,4,5,6 if  repition of digits is allowed......i dnt get why is it 6 to da powr of 3? ??? ??? ??? >:(
Its a 4 digit num between 5000-6000
So da last 3 digits r changed wit those of da range..
Dat is each zero haz 6C1 different variables.
4 all 3 zero's 6C4*6C1*6C1=63
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Freaked12

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Re: S1 DOUBTS HERE!!!!
« Reply #40 on: May 24, 2010, 03:41:22 am »
Quote from: immortal on May 23, 2010, 09:48:54 am
Its a 4 digit num between 5000-6000
So da last 3 digits r changed wit those of da range..
Dat is each zero haz 6C1 different variables.
4 all 3 zero's 6C4*6C1*6C1=63


So immortal how did you find S1 past papers so far?
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Offline immortal

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Re: S1 DOUBTS HERE!!!!
« Reply #41 on: May 24, 2010, 03:16:49 pm »
Quote from: Freaked12 on May 24, 2010, 03:41:22 am
So immortal how did you find S1 past papers so far?
y do u ask ???
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Freaked12

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Re: S1 DOUBTS HERE!!!!
« Reply #42 on: May 24, 2010, 10:06:15 pm »
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Offline simba

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Re: S1 DOUBTS HERE!!!!
« Reply #43 on: May 25, 2010, 09:54:53 am »
need help in June 09 number 1 , how to get Z....urgent
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Offline astarmathsandphysics

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Re: S1 DOUBTS HERE!!!!
« Reply #44 on: May 25, 2010, 11:33:26 am »
When i get home
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