How was Math Paper 62

[Amy Bloom]

GT won't be high ! may/june 2012 (62) 38/50 was an A and it was MUCH easier than the paper we got today so i guess A will be 33/50

Hope whatever you're saying will be true.

 

[rizwaan]

woah is there a typo!!!! 20 in p6 and 40 in p7!!!!!!!ulta kaam hai......total will be 155, if u r lucky its a B, else very high chances a C

I am very weak in combination and permutation and in the probability dist table.today i did not do these two whole questions. but i know my s2 well.

 

[good man12]

I am very weak in combination and permutation and in the probability dist table.today i did not do these two whole questions. but i know my s2 well.

nice....thats good, inshallah , aim higher in S2, and its likely a B

 

[hanyigcse]

nice....thats good, inshallah , aim higher in S2, and its likely a B

could you discus the answers with me inbox ?

 

[Dark soul]

if i get 65 in P1, 40 in M1, 55 in p3 and 25 in s2..what will be my grade?

 

[yazan1995]

if i get 65 in P1, 40 in M1, 55 in p3 and 25 in s2..what will be my grade?

A grade i guess.....

 

[Dark soul]

A grade i guess.....

sorry it was s1
even if my mark for s1 does not meet the grade threshold for A..will i still get an A??

 

[yazan1995]

sorry it was s1
even if my mark for s1 does not meet the grade threshold for A..will i still get an A??

yeah . ur P1 and M1 is an A for sure . p3 i guess it's a strong B unless the paper was really hard so it could be an A . i guess an A overall .

 

[Dark soul]

thnks for info

 

[Khalifa]

Can someone please post the answers now- 24 hours are up

 

[hanyigcse]

anyone post the answers ?

 

[Khalifa]

For the 5th question

I did it like this- part a) no restrictions-12P8 or 12!/4!- consider blank seats as repitition= 19958400
b) if we consider the 2 to be together, we form 11 blocks. - 11! Ways. However 4 blank seats so count that as repition
So 11!/4!. Now multiply by 2 as 2, within the first block there can be two arrangements so2*11!/4!= 3326400
Now subtract from part a to get 16632000
c) all 8 people together- consider them to be 0ne block. Within can be arranged in 8! Ways. Along with 4 other blocks can be arranged in 5! ways. However 4 repititions so 8!*5!/4!= 8!*5=201600

Is this correct?

 

[hanyigcse]

they are all right for number A and C but for B i made the same steps but the answer came with me as 16632000 not 1663200 ,i guess u made a typo right ?​

 

[Khalifa]

they are all right for number A and C but for B i made the same steps but the answer came with me as 16632000 not 1663200 ,i guess u made a typo right ?​

Yup, you're right. How did you do the 200 one?

 

[hanyigcse]

which one ?

 

[Khalifa]

The one which I think was normal approximation to binomial. At least 160

 

[hanyigcse]

yes u will less by half so it will be 159.5 then get the mean by multiplying the p with the number so it will give 170 and get the standard deviation by multipling the mean by the q

 

[Khalifa]

So you basically took 0.85 as p right?

 

[hanyigcse]

So you basically took 0.85 as p right?

yes, anything else u need ?

 

[hanyigcse]

yes, anything else u need ?

how much marks did u lost ?and The GT u expect?