Stat v. 62

[syed1995]

For P(0), isn't it supposed to be 5/12 * 6/10.
Coz there were 3 chocolates in Ahmad's bag, so the remainder is 6.

Dude.. but a toffee is getting added as well..! there were 4 toffees 3 choco and 2 Boiled.. but a toffee is getting added or the total will be 6/9 according to what you're saying since 3 choco and 6 remaining that's 9 total. .. which brings it to 5 toffees 3 choco and 2 boiled...

 

[salvatore]

it was so easy why not it was simply
mean=n(k/9)
var=n(k/9)(1-K/9)

I used a different approach.
Mean = np = 96
Variance = (np)q = (96)q
96 q = 32
q = 1/3
p = 2/3

Mean = np
96 = n(2/3)
n = 144

 

[syed1995]

i took total candy ahmad has as 11 shit shit shit so it will cound as a genuine error and maks will only be deducted in one part right?

If it was 5 marks.. 1 method and 1 final answer.

 

[syed1995]

it was so easy why not it was simply
mean=n(k/9)
var=n(k/9)(1-K/9)

Yea that came to my mind as soon as the examiner said .. time's up

 

[syed1995]

Anyways A star

Let's do computing now mate! tomorrow's the deadly paper!

 

[salvatore]

Dude.. but a toffee is getting added as well..! there were 4 toffees 3 choco and 2 Boiled.. but a toffee is getting added or the total will be 6/9 according to what you're saying since 3 choco and 6 remaining that's 9 total. .. which brings it to 5 toffees 3 choco and 2 boiled...

Ahh yeah.. I knew I had done something wrong in that question. But I got the value for P(2) as 4.75
Anways, that's the only question (so far) that I have messed up in..

 

[syed1995]

I used a different approach.
Mean = np = 96
Variance = (np)q = (96)q
96 q = 32
q = 1/3
p = 2/3

Mean = np
96 = n(2/3)
n = 144

SIR JEE CHAH GAYE that method is so awesome!

 

[A star]

If it was 5 marks.. 1 method and 1 final answer.

there were parts before it werent there?

 

[syed1995]

Ahh yeah.. I knew I had done something wrong in that question. But I got the value for P(2) as 4.75
Anways, that's the only question (so far) that I have messed up in..

That's Awesome! you'd get 3 in that question too.. 1 method mark will be lost and 1 accuracy mark. I messed up one part in permutation too Because I misread the question and took total chosen as 15 .. in the one where we had to find ways to do 12.

 

[syed1995]

there were parts before it werent there?

one 4 mark question and a 1 mark question i think.

 

[beeloooo]

GUYS I USED 96=np and 32= np(1-p) ! but still i calculated the value wrongly will i be awarded any marks ? p.s this is my only mistake i hope ! -_-

 

[salvatore]

That's Awesome! you'd get 3 in that question too.. 1 method mark will be lost and 1 accuracy mark. I messed up one part in permutation too Because I misread the question and took total chosen as 15 .. in the one where we had to find ways to do 12.

Yeah.. hopefully.
Ohh.. don't worry, its just 3 marks

 

[A star]

one 4 mark question and a 1 mark question i think.

so i will lose 2 marks or gain 2 marks?
i think i should loose around 2 marks only -_- on the whole

 

[syed1995]

Yeah.. hopefully.
Ohh.. don't worry, its just 3 marks

that and that npq one.. which was 4 marks.. that's 7 marks. Apart from that I didn't mess up anywhere!

 

[beeloooo]

last question last part answer ? 7/24 , 19/40 and 7/30 right ?

 

[syed1995]

so i will lose 2 marks or gain 2 marks?
i think i should loose around 2 marks only -_- on the whole

If you drew the Tree Diagram incorrectly. AND TOOK all the values from there .. then you should be fine.. but if you didn't drew the tree diagram then I don't know :\

I would say 3 marks. all the accuracy ones..

 

[syed1995]

last question last part answer ? 7/24 , 19/40 and 7/30 right ?

Aye.

 

[beeloooo]

GUYS I USED 96=np and 32= np(1-p) ! but still i calculated the value wrongly will i be awarded any marks ? p.s this is my only mistake i hope ! -_-

 

[syed1995]

A star

Honestly the last question wasn't clear IMO.. i mean they said they take out 2 toffees.. but they weren't clear whether they take out two toffees from sarah and add to Ahmed or take one toffee from sarah, put it in ahmed and then take one from ahmed :\

 

[littlecloud11]

Yo if you can tell me the toffees / chocolates in each bag.. I can calculate it for you right here right now.

No No No, crapppp! if the last permutation is what you say it is my paper is ruined!