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I mentioned somewhere a few minutes ago that this will lead toyeah i know that much.. that leaves us with -a//root21 <Z < a/root21 = 0.5
what to do after that! i dont understand how ms got 0.75..
Already cleared before. check the previous pages.
OH right. thanksssI mentioned somewhere a few minutes ago that this will lead to
2fi(a/root21)-1 = .5
fi(a/root21) = 1.5/2
fi(a/root 21) = .75
cnt find. sorryAlready cleared before. check the previous pages.
attached a file. see if that's what you need.uh I donno how else to type it .. but here
View attachment 10557
and a=v(dv/dx) .. I need to find a.
Here. Comment #3264cnt find. sorry
yes thankyou =]attached a file. see if that's what you need.
Thx~~~Finally I get it2^12 implies each coin in 2 ways. It wont matter if its heads or tails. but we do require a specific number
thnx.. but in the markscheme, the median is given as 19(11th value). the LQ is given as 10(mean of the 5th and 6th values) and the UQ is given as 24(the mean of the 16th and 17th value)...
WHY??
Ok so the table will be like this, 5 girls and 3 boys , and a team of 4. so at minimum we can have 3 guys and 1 girl.
Eight cards are selected with replacement from a standard pack of playing cards
with 12 pic cards, 20 odd cards
and 20even cards.
a) how many different sequences of cards are possible?
b) how many of the sequencees in part (a) will contain three picture cards, three odd cars and two even cards??
oh I got it.. i took time until I realised that 3C3 is actually 1(for boy).. I appreciate ur help. thanksOk so the table will be like this, 5 girls and 3 boys , and a team of 4. so at minimum we can have 3 guys and 1 girl.
B- boy. G- girl
BBBG = 5C1
BBGG= 3C2*5C2
BGGG= 3C1*5C3
GGGG= 5C4
Add them up to get total possibilities. Divide each value above by this Total possibilities to get its probability. Hope this is it.
X..........1...2....3....4....
P(X)....
BTW 20C7 IS 12!/7!5!Why can't we use 2^12/7!5!.....Sorry~~
But where was this from? u just had to multiply what i gave with V right?yes thankyou =]
Didnt I clear this?someone please explain how to calculate the mean and standard deviation using a histogram? i cant understand the ms..:'(
I donno .. I think Im still confused =[ but it helped that you tried.But where was this from? u just had to multiply what i gave with V right?
Yupp.. you didd... i was using the same method but the answer was wrong somehow. :/Didnt I clear this?
how should i know when to use this method and when to simply use the probability given?The 94% probability is the area in the MIDDLE, which means there is a "tail" on either side, of 3% probability. When you look for z value you need to count from the left side, or negative infinity. So here the probability is 0.94 + 0.03 = 0.97
View attachment 10051
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