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# Edexcel S2 - 27th June 2016 AM Watch

• View Poll Results: How did you find the Edexcel S2 exam?
Very hard
145
14.71%
Hard
331
33.57%
Normal
293
29.72%
Easy
152
15.42%
Very easy
65
6.59%

1. Q1-
1.41=1.4419 so mean=varaiance so use poisson
0.2510
0.7769
0.1378
0.1516

Q2-
n=60
0.0133
0.0159

Q3-
1/2
151PI/3 REPLY TO THIS as well PLZ

Q4-
B=8
A=-12
K=1/9

Q5-
N=225

Q6-
57

Q7-
1.2
0.24
41.875 AND 40 REPLY TO THIS ONE IT IS ABOUT THE MONEY LAST ONE.
2. (Original post by kingaaran)
you have to divide by sqrt(0.16n) when standardising
thats what I did..
3. (Original post by Raees_Sharif)
you will get 4/5 marks
Where did I go wrong?
4. how many marks was the P(7<R<10) question
5. (Original post by igotohaggerston)
how many marks was the P(7<R<10) question
1 mark
6. (Original post by SB0073)
Where did I go wrong?
I LOST A FRIEND

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7. (Original post by ISAAQAHELP)
Q1-
1.41=1.4419 so mean=varaiance so use poisson
0.2510
0.7769
0.1378
0.1516

Q2-
n=60
0.0133
0.0159

Q3-
1/2
151PI/3 REPLY TO THIS as well PLZ

Q4-
B=8
A=-12
K=1/9

Q5-
N=225

Q6-
57

Q7-
1.2
0.24
41.875 AND 40 REPLY TO THIS ONE IT IS ABOUT THE MONEY LAST ONE.
Got the same as you for everything apart from the n=225 which I messed up on, well done they're all correct (from memory)

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8. (Original post by Amitbalter)
1 mark
wow are you sure I thought it was 2 or 3 marks
9. (Original post by iMacJack)
Got the same as you for everything apart from the n=225 which I messed up on, well done they're all correct (from memory)

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Ye for that question some people put in 0.2n and 0.16n straight into normal parameters you could have just put mue and standard devation squared and then at the end find n.
i think i might have lost 1 mark for 41.875 should have rounded t to 41.88 since its money
10. What would 53 marks be in UMS wise?

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11. (Original post by imran_)
What would 53 marks be in UMS wise?

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proabably a mid/high C so anywhere between 64-69
12. guys, for qs 3, Area = pie R², so E(A) = E(pie R²) : pie x E(R²). you then workt out E(R²) = Var(R) + ( E(R) ) ². the values were 5 and 9, do the math, the answer is 151/3 pie
13. does anyone know how many marks each question was
14. Eyyy that was an easy paper. Didnt expect that
15. (Original post by asacred)
guys, for qs 3, Area = pie R², so E(A) = E(pie R²) : pie x E(R²). you then workt out E(R²) = Var(R) + ( E(R) ) ². the values were 5 and 9, do the math, the answer is 151/3 pie
It was 49pi
16. (Original post by ISAAQAHELP)
Ye for that question some people put in 0.2n and 0.16n straight into normal parameters you could have just put mue and standard devation squared and then at the end find n.
i think i might have lost 1 mark for 41.875 should have rounded t to 41.88 since its money
I got 200 something ffor the n but Im sure it wasnt 225
17. (Original post by fpmaniac)
It was 49pi
can you please explain how did you get that ? instead of just saying "ur wrong "
18. (Original post by ISAAQAHELP)
Q1-
1.41=1.4419 so mean=varaiance so use poisson
0.2510
0.7769
0.1378
0.1516

Q2-
n=60
0.0133
0.0159

Q3-
1/2
151PI/3 REPLY TO THIS as well PLZ

Q4-
B=8
A=-12
K=1/9

Q5-
N=225

Q6-
57

Q7-
1.2
0.24
41.875 AND 40 REPLY TO THIS ONE IT IS ABOUT THE MONEY LAST ONE.
Pretty sure it was 49pi and i got other answer for n=225, I got n=200 something
19. (Original post by asacred)
can you please explain how did you get that ? instead of just saying "ur wrong "
I found what E(R) was (a+b/2) then A=piR2 So you had to square E(R) to get (E(R))2 and times by pi which will give you E(A)
20. (Original post by fpmaniac)
I found what E(R) was (a+b/2) then A=piR2 So you had to square E(R) to get (E(R))2 and times by pi which will give you E(A)
squarring e(R) does not equal E(R²)....

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