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S1 - WJEC - 15th June 2016 Watch

1. (Original post by Mango88)
How did everyone find it??
Very similar to all the past papers - not too bad at all. Absolutely dreading c4 on Friday though

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2. (Original post by 98matt)
Very similar to all the past papers - not too bad at all. Absolutely dreading c4 on Friday though

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What value did you get for m at the end?
3. For the median? Something like 1.6.... something

Or for P(over 1.5hrs hmwk) = 5/8

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4. (Original post by Mango88)
What value did you get for m at the end?
Could someone explain the expected profit one?
5. (Original post by Maths is Life)
Could someone explain the expected profit one?
I just couldnt do it Ended up guessing
-£5
6. (Original post by Maths is Life)
Could someone explain the expected profit one?
That really confused me!!
7. How did everyone do the question about the guy getting the shots and spending £5, did you use the tables? Because I couldn't :/
8. (Original post by Maths is Life)
Could someone explain the expected profit one?
Yes!!! This really got me too, I skipped it and went back at the end. This is what I did (not sure if it's correct)

Using the probabilities calculated in parts i) and ii) I did:

{Amount of money for X=2 (I think £10) × P(X=2)} + {Amount of money for X>2 (I think £25) × P(X>2)}

So that would give you the average profit made, I believe I got £3.39 ish. But since it cost £5 to play, the profit is £5.00 - £3.39 = £1.61

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9. I got £1.70 or something like that, but I've completely forgot how I got it 😂😂😂
10. Overall I found it a very nice paper
11. Does anyone have an unofficial mark scheme?
12. (Original post by FusionNetworks)
I just couldnt do it Ended up guessing
-£5
I think it was -5 times P(X<2) + 5 times P(X=2) + 20 times P(X>2).
13. So was the jack committee one ok with everyone?
Im probably wrong. 1c1x7c2/8c3????
Since jack is only one person😃?
14. (Original post by Maths is Life)
So was the jack committee one ok with everyone?
Im probably wrong. 1c1x7c2/8c3????
Since jack is only one person😃?
I sort of had an idea that it would be 3/8 anyway because it's just him, but I did do the method you did and got 3/8 anyway.
15. (Original post by Maths is Life)
So was the jack committee one ok with everyone?
Im probably wrong. 1c1x7c2/8c3????
Since jack is only one person😃?
Looks right to me! I did 8C1/8C3 but im pretty sure thats wrong lol
16. Any unofficial recommended/suggested answer for expected profit?
I tried using Y=aX+b but that has been used in a previous question.
I worked out that he is expected to hit once tho😂😂
17. Also for that girl whose calculator was not-so scientific would you simplify the ncr formula book equation?
18. (Original post by Mango88)
What value did you get for m at the end?
I think 1.56??? I dont think thats right but al long its something in the range and 3SF...
19. was E(X) (CRV -PDF)
19/6 k
And then times half.....
20. Am I the only person who thought the paper was quite difficult?

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