Statistics Paper 62 -- How was it?!

[Silent Hunter]

I'm not sure , but i was confident about this question

GoOd

 

[Bushrafareed]

yaar wo binomial walay ka 0.999 nai hay?

Which question q 2?

 

[Sidma khan]

Which question q 2?

yeah i think!! jis may p was 0.65

 

[Bushrafareed]

i don't remember this one , you are asking about expected value right? I remember Y had values O, 2, 4 - probablities 0.48 , 0.42 and 0.1 maybe

 

[Sidma khan]

i don't remember this one , you are asking about expected value right? I remember Y had values O, 2, 4 - probablities 0.48 , 0.42 and 0.1 maybe

ye wala mene aisa he kya hay/ but m asking about jis may greater than 2 but less than 12 ki pr find karni thi

 

[Bushrafareed]

i did like 1 - p(x=2)-p(x=1)-p(x=0)-p(x=12). Don't remember final answer

 

[Sidma khan]

i did like 1 - p(x=2)-p(x=1)-p(x=0)-p(x=12). Don't remember final answer

yeah thats rYt!!

 

[Bushrafareed]

i guess my value was 0.993 , you must rounded off all the values may be that's why your answer was 0.999

 

[Sidma khan]

i guess my value was 0.993 , you must rounded off all the values may be that's why your answer was 0.999

No i think i didnot subtract the pr of 12! Tau ub meray out of 3 ktney aen gay?

 

[Bushrafareed]

No i think i didnot subtract the pr of 12! Tau ub meray out of 3 ktney aen gay?

I think 2 asktey hein , not sure ..

 

[Sidma khan]

I think 2 asktey hein , not sure ..

Hmm Appk tau 50/50 anay hain

 

[Sidma khan]

Dua karo , haven't discussed the whole paper , my P3 was realllyyyyy bad ,

yei Tough questions thay i guess!! Mine m1 was flop... p3 ok that p1 good! n s1 may b 47 a he jaen gay

 

[Bushrafareed]

yei Tough questions thay i guess!! Mine m1 was flop... p3 ok that p1 good! n s1 may b 47 a he jaen gay

I gave p1 and M1 last year , got A. S1 was good. But p3 , not sure , left a question of around 4 marks and had many answers wrong

 

[Ahmed Tariq]

oh yes exactly 2 unwrapped ya wrapped biscuit lene thay from 4 i guess , I did like 4C2 * 18/30 * 17/29 *12/28*11/27

Are you perfectly sure this method is valid?

 

[Jaf]

Are you perfectly sure this method is valid?

It's not. You're supposed to multiply the entire thing by 4!/2! instead of 4C2.

 

[alphabravocharlie]

i did the long way and got the same answer as yours i think am relieved

How did you do it?

 

[Sammar]

yar mai 12 ki 15 se bionomial distribution ki hai . How many marks will lose for it ? In Q3

 

[alixx]

R u sure?? I subtracted the probability of 0,1,2 from 1....its not ryt?

its not u had to subract 12 also because it was between 3 and 12 with excluding 3 and 12

 

[BILALrox01]

It's not. You're supposed to multiply the entire thing by 4!/2! instead of 4C2.

its the correct method. multiply by 4C2 or by 4!/(2!*2!). as there r two wrapped and two unwrapped

 

[Bushrafareed]

Are you perfectly sure this method is valid?

yes, i'm sure. I checked this method from marking scheme for without replacement questions.