Urgent: Maths CIE Stats

[$!$RatJumper$!$]

for the summation of (x-50) i got 24 and for the summation of (x-50)^2 i got the same thing 712 or 715 something like that but i cant remember the exact number !! for the s.d i got 6. something or 7.something and for the new mean i got 52.7 !!
and how about the last question (iii) ?? i got 9030 and I'm pretty sure it's wrong !!

thats gr8! my values for question 2 were exactly the same as yours last question, hmm i really cant remember.. though they were HUGE numbers lol
and what did u get for the 6 mark q'n? i got 8/11

[lana]

yaaay !!
i got 8/11 too 
and I almost died solving the last question reallyy tricky 

[$!$RatJumper$!$]

haha hi5 yes last question required a lot of thinking! lol

[Deadly_king]

thats gr8! my values for question 2 were exactly the same as yours last question, hmm i really cant remember.. though they were HUGE numbers lol
and what did u get for the 6 mark q'n? i got 8/11

8/11 is the correct answer.

Last number, huge numbers as well except for the two probabilities.

for the summation of (x-50) i got 24 and for the summation of (x-50)^2 i got the same thing 712 or 715 something like that but i cant remember the exact number !! for the s.d i got 6. something or 7.something and for the new mean i got 52.7 !!
and how about the last question (iii) ?? i got 9030 and I'm pretty sure it's wrong !!

Apart from the s.d, I got more or less same answers.

I think I messed up the s.d

[mousa]

yaaay !!
i got 8/11 too 
and I almost died solving the last question reallyy tricky 

niceeeeee i got 8/11 aswell lool the lasst question was helllllllll!! I remember getting a 2/3 or something like that in the very last part of the last question 

[Deadly_king]

niceeeeee i got 8/11 aswell lool the lasst question was helllllllll!! I remember getting a 2/3 or something like that in the very last part of the last question 

Yeah...........some of my friends got 2/3 as well.

I guess it is the right answer...........but I could not link it

[lana]

niceeeeee i got 8/11 aswell lool the lasst question was helllllllll!! I remember getting a 2/3 or something like that in the very last part of the last question 

I got 2/3 too !! =] how about (iii) what did you get ??

[mousa]

I got 2/3 too !! =] how about (iii) what did you get ??

hmm I dont quite remember, though i might.. in case you tell me your answer 

[lana]

i got 9030 but i'm pretty sure it's wrong !! i think the right answer was around 4000 

[$!$RatJumper$!$]

2/3 is right.. i got that too and since i could not find the new s.d i just sed it was the same as the original.. lol what were ur values for the new s.d

[lana]

I think 7.94 was the correct answer !! do you remember the answer for question 7 (iii) ??

[$!$RatJumper$!$]

could you remind me the question. i forgot what it was lol

[lana]

I think it was in how many ways can the man or the women be on the committee but not both

[$!$RatJumper$!$]

As far as i remember, the info they gave was:
If there are 10 men and 9 women. What are the ways of choosing 6 people if there are atleast 4 men and 1 woman.

iii) If one particular man or one particular women are on the committee but not both.

Answer I got:

(9C3*8C1*13C1) + (9C3*8C2) + (9C4*8C1) + (8C1*9C4) + (8C0*9C5) = 13230

[lana]

are you sure this is correct ???and By the way what do you expect the grade boundaries for an A to be for this variant ??