- Messages
- 19
- Reaction score
- 11
- Points
- 13
Q6(iv) will take the range from 0.5<x<100.5 and 100.5<x<150.5 and so onhttp://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf
Q6 (iv) why do we use 50.5 , 125.5 and so on as mid values ?! .. why did we add the 0.5 and from where It Came !?
Q7 fully
Thanks
ZaqZainab
Q7(a) (i) n=9 p=1/6 q=5/6
p(x>=1) = 1-(9C0 * 1/6^0 *5/6^9)
ii) 1-(5/6)^n <0.9 0.1<(5/6)^n Ln(0.1)<n*ln(5/6)
N>ln(0.1)/ln(5/6)
n>12.6 N=13
(B) if the 3rd one is yellow = 5/8 * 4/7 * 3/6 * 2/5 * 1/4 * 3/3
If the 2nd is yellow = 5/8 * 4/7 * 3/6 * 3/5
If the 1st is yellow = 5/8 * 3/7
Then add all of them