We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
P(Judy wins with the 2nd choice of cards)= P(0) + P(>=4)pls help me with question 7iv and v
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_62.pdf
ok...this i get it P(>=4) but why do we have to include P(0)?
the ques. says that " If the score is 0 they play again"...and then in part (iv) they ask you to find the probabilty that Judy wins with the second choice of cards...hence you include the prob. of zero , times the prob. that judy wins..
p (a intersection b) = p(a) *p(b)
this one i can help u with 4b and 7ii but the other two m not sure
thankyouthis one i can help u with 4b and 7ii but the other two m not sure
4b) 1 2 3 4 5 6
here u want the number of ways 4 and 5 are not next to each other, so u will have to find number of ways they are next to each other then subtract it from the number of ways the six numbers can be arranged in a line
so first number of ways all numbers can be arranged = 6! =720
now to find number of ways they are next to each other, u can take 4 and 5 as one unit..i mean
1 2 3 4 5 6 u can take it as one so that now u have 5 numbers to arrange that will be 5! and since 4 and 5 are different u can arrange them in 2 ways
so ur answer will be 6!-(5!*2) = 480
so prob =480/720 = 2/3
hope i was clear
thanls alot!
12/30+13/30....this is because the initial 12 females includes the females who watch kops are kids so they meet all the criterial and so the only other criteria to meet is the men who watch kops are kids which are 13..
as far as i know the first can be any colour so its prob is 1 and the one after that cant be the same colour so it will be 2/3 followed by 2/3 until the rest 7 slots are filled....as a result the ans is (2/3)^7
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now