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# OCR (Not MEI) S1 Wednesday 8th June 2016 watch

1. (Original post by catwat99)
How?? I did (3x2x1x2)/7P4
Isn't it because of the repetitions it's over 210
2. (Original post by Breynolds2671999)
I thought i did it wrong, can't believe i actually got it right
thats was i did!! omd i thought i was wrong, does anyone remember wat answer came out?
3. (Original post by RochL)
S2g im only person who got 2/35 for ABBA 😂😂 what was the actual answer?
I got that too
4. for the barbara question, did anyone else get 1/210?
5. (Original post by catwat99)
How?? I did (3x2x1x2)/7P4
i did same as you but over 7c4 as those were the total ways in which the 4 cards could be selected...... i thought
6. For the second part of the 1st question, could you use binomial ?

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7. (Original post by Jamesk123)
I got 2/35
I was unsure but asked my teacher who got 1/70 same as me and so did one of my friends but there also seem to be a lot of other answers out there so I am unsure
8. so for the ABBA question, wat was the actual answer??
9. (Original post by student199919)
for the barbara question, did anyone else get 1/210?
No i got 1/210 but there were multiple a, b and r's so i did 1/210 x 3!2!2!, probably got it wrong but it is only 1 mark
10. (Original post by student199919)
for the barbara question, did anyone else get 1/210?
Yes
11. who thinks this years paper was harder than last years?
12. (Original post by Ella rivers1)
For the second part of the 1st question, could you use binomial ?

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Yeah i think you were meant to, i did anyway
13. How do you do the standard deviation question and what was the answer
14. (Original post by Ozil5)
Yeah i think you were meant to, i did anyway
wat was the question?
15. Also did anyone get 146.5 for the mean of the apples?
16. (Original post by StruanCaughey)
I was unsure but asked my teacher who got 1/70 same as me and so did one of my friends but there also seem to be a lot of other answers out there so I am unsure
I got 7C4 as the total amount =35
And then 2! X 2! = 4 so 4/35
17. How did you work out the box plot question?
18. For the question with 9<X<20 I did P(X<20) - P(X<10), which is the same as (1-P(X>19)) - (1- P(X>9)) then just work it out ...

Is that right?
19. (Original post by kassy12324)
How did you work out the box plot question?
149-140
20. (Original post by Breynolds2671999)
No i got 1/210 but there were multiple a, b and r's so i did 1/210 x 3!2!2!, probably got it wrong but it is only 1 mark
I did exactly the same and I don't see why it's wrong?

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