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# Cie as level paper 6 Watch

1. Hey everyone. How many of you have gave paper 6 ( stats ) today? I gave paper 62 and it wasn't really that hard except a permutations question . What about you guys? How was the paper for you? I'm very happy because since P 12 was so easy so I expected this to be harder :P
2. same here, definitely got that permutation and combinations question wrong but other than that everything else was pretty easy. grade boundaries must be really high.
3. Yeah true the paper was indeed too good to be true . I think i got the permutation question right although im not quite sure.
I'm just waiting for the solutions to leak online
4. the permutations question was easy!

i got one little query though-what was your answer to no.2 where they ask for the probability for time taken between 5-10 minutes? it was of only one mark.
5. (Original post by SamihaTahsin)
the permutations question was easy!

i got one little query though-what was your answer to no.2 where they ask for the probability for time taken between 5-10 minutes? it was of only one mark.
We just had to subtract the 2 probabilities. So the ans was 0.72 . What was your ans to the question of "exactly 6 letters between 2 W" mine was 20160 :/
6. (Original post by Some one)
We just had to subtract the 2 probabilities. So the ans was 0.72 . What was your ans to the question of "exactly 6 letters between 2 W" mine was 20160 :/
I got 3720 but I am not really sure about it since I considered them asking us an 8 letter alphabet. But my friend said it should be a 10 letter one and if that is the case, it would become different.
7. (Original post by Coloneltreavy)
I got 3720 but I am not really sure about it since I considered them asking us an 8 letter alphabet. But my friend said it should be a 10 letter one and if that is the case, it would become different.
Yea we had to consider a 10 letter alphabet not 8 .
8. (Original post by Some one)
We just had to subtract the 2 probabilities. So the ans was 0.72 . What was your ans to the question of "exactly 6 letters between 2 W" mine was 20160 :/

don't remember the exact value but it was pretty huge like the one you quoted. and i am quite sure mine is right, finished all the others real quick and had 25 mins to do the permutations.
9. (Original post by Some one)
Yea we had to consider a 10 letter alphabet not 8 .
Then 22320
10. (Original post by Coloneltreavy)
Then 22320
Nah I don't think so.
We had to first consider 3Ls between 2W then 2L between 2W then 1L then add them up.
11. (Original post by Some one)
Nah I don't think so.
We had to first consider 3Ls between 2W then 2L between 2W then 1L then add them up.
This is exactly what I did.

With three Ls, you need to add a combination of 3 alphabets so 5C3
Multiply it by 6P6 because 6 numbers and divide by 3!
Repeat wit 2 L: 5C4*6P6/2!
With 1L: 5C5*6P6
We can consider W to W as a whole and 2 letters are left out so multiply the sum of previous example with 3! (This, I missed)
12. (Original post by Coloneltreavy)
This is exactly what I did.

With three Ls, you need to add a combination of 3 alphabets so 5C3
Multiply it by 6P6 because 6 numbers and divide by 3!
Repeat wit 2 L: 5C4*6P6/2!
With 1L: 5C5*6P6
We can consider W to W as a whole and 2 letters are left out so multiply the sum of previous example with 3! (This, I missed)
Yes you're right except that for 1L we have to multiply by 3!/2! Beacuse there are 2L outside now.
13. This is how I did it:
So first 3Ls between the the 2 W so we need three more letters from 5 more so 5C3, then arranging so
5C3*(6!/3!)*3! = 7200
Then 2Ls : 5C4*(6!/2!)*3! = 10800
Then 1L : 5C5*6!*(3!/2!) = 2160
Total arrangements = 7200+10800+2160=20160.
14. (Original post by Some one)
This is how I did it:
So first 3Ls between the the 2 W so we need three more letters from 5 more so 5C3, then arranging so
5C3*(6!/3!)*3! = 7200
Then 2Ls : 5C4*(6!/2!)*3! = 10800
Then 1L : 5C5*6!*(3!/2!) = 2160
Total arrangements = 7200+10800+2160=20160.
You're right. This makes sense. I wonder if they will give me any marks :')
15. I bet you will score 2/4 marks for method (which isn't too bad)
16. (Original post by Some one)
I bet you will score 2/4 marks for method (which isn't too bad)
I dont know man. CIE is pretty strict on marking. I would assume them to give 1 mark for the 3L thing, another for 2L, and one more for L. Last mark for correct answer. That's how they usually do.
https://justpastpapers.com/9709_s16_qp_62/
https://justpastpapers.com/9709_s16_ms_62/

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