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Here u go!
Which year is this from?STATS (Can someone help?)
The random variable X has the distribution B (20,p)
Given that p=0.7 and P(X≥x) >0.1, find the greatest possible value of x.
Is there a straight forward method rather than the long method of trying?
The answer is 17 just in case.
Thanks
Thanks a Lot!!Here u go!
I'm sorry I forgot. I believe its somewhere between 2005 and 2008.Which year is this from?
Which paper component is it from?Does anyone have Notes about rotation of complex number point when it is mulitiplied or divide by other complex number?
Paper 3 MATHS ALEVEL.Which paper component is it from?
I didn't see it in the syllabus...anyways if you find them plz sharePaper 3 MATHS ALEVEL.
Okay, first of all, keep in mind the fact that they are similarActually its an olevels question but i wasnt getting answer in o level thread so i decided to ask it from a level thread members
i hope no one minds it ::)))))))
help me with part b and part c of this question :
so lets look at thisActually its an olevels question but i wasnt getting answer in o level thread so i decided to ask it from a level thread members
i hope no one minds it ::)))))))
help me with part b and part c of this question :
Feeling lazy so won't solve it, just guide. You make any two equations and solve them simultaneously for example:Measurements of wind speed on a certain island were taken over a period of one year. A box-and-
whisker plot of the data is obtained where the LQ= 39 and UP=63. It is suggested that wind speed can be modelled approximately by a normal distribution with mean μ and standard deviation σ.
(i) Estimate the value of μ.
(ii) Estimate the value of σ.
The value of μ=(63+39)/2=51, but can someone help me how to find the σ?
|z-10i|=2|z-4i|Someone plz post the solution to the (ii) part
Can you please explain this part again? I don't get the concept of 4^2 ?|z-2i|=(z-2i)(z*+2i)=zz*-2iz*+2iz+4
Now compare this with the earlier equation we have proven. If we subtract 16 from this new equation, both the equations would be equal right? So...
zz*-2iz*+2iz+4=4^2 - notice i out 4^2 not 16 because we were squaring both sides of the equation as the question had told us to do earlier.
Hence radius=4 making the equation |z-2i|=4
Ok so we are trying to find out the radius of the (circle) complex number |z-4i| right? So how our earlier proof showed us that we need to square both the sides and gather the terms to show that one side of complex number is equal to the other. Basically, the proof zz*-2iz*+2iz-12=0 shows us that every complex number equation must boil down to this if both sides of equation are equal.Can you please explain this part again? I don't get the concept of 4^2 ?
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