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Suppose the rv Y is normally distributed with mean 2, and variance 25
a) Find the probability that Y exceeds 1, given that Y is positive.
b) Find the expected value of Y , given that Y is positive
HINT: For b) first derivative the cdf of the rv given by X= (X/ Y>0)
Can some one help plssssssssssssss
Can someone please help me to get the 1st and second derivative of the following..
m(t)= [e^((k)((e^t)-1)]/ ((1-bt)^a))...
thnk u....
in a uni games tournament, 64 students are about to participate in a chess knockout tournament.
The first round consists of 32 games, with 2 students per game.
The 32 winners of the first round get to play in the 2nd round, which consists of 16 games, and so on, until an overall winner is declared in the 6th round.
(in the case of a draw n any game, a coin is tossed to determine the winner)
a) In how many differrent ways can the 64 participating students be paired up on the first round? (order not required)
b)Suppose the 64 players are of equal ability, and pairing up is purely random on each round.
Find the probability that EVA and BRETT( 2 of the 64 students) will get to play each other at some stageduring the knockout competition....
Can some please help me with this question.....
Thanks loads!!!!!!!!!!!
( working please;))
lim (x,y) approaches (0,0): sinh ((x^2) +(y^2)) /((x^2) +y^2))
How do u show the workings??
b) lim (x,y) approaches (0,0) : ((x^3) -(y^3))/((x^2) +(y^2)))
Plese show me how to write it out as I don't know how to explain it... Sorry for the trouble...
Thanks A Lot:))
A nitric acid solution flows at a constant rate of 6 litres/ min into a tank which initially held 200 litres of 0.5% nitric acid solution. The solution in the tank is kept well mixed through stirring and flows out of the tank at a rate of 8 litres / min. If the solution entering the tank is 20% nitric, then
a) determine the volume of nitric acid in the tank after t minutes.
b) determine when the % of nitric acid reaches 10%.:|
Suppose A is a square matrix such that det A^4=0. Esplain why A cannot be invertible.
b) Consider a square invertible matrix A. Ifthe entries of A are integers and det A= +/- 1, then show that the entries of A inverse are integers....:D
how do u integrate
1/((x(1- (ln^2(x))^0.5))
suppose A is a 4x3 matrix and C is a 3x4 matrix such that CA=I3. Suppose further that for some given b in R4, the equation Ax=b has atleast one solution. Show that this solution is unique...
Thanks a lot!!! that helped;))
How??
How do you finf the limits for the following
a) lim (as x approaches 1) ((ln(sinh(x-1))/(ln ((x^2)-1))?
b) lim( x approaches 0) xln(tanh(x))?
how do you show that
lnx<(x^1/2) x>0...
I tried dis question over and over and i cldnt get it rite!!1
An electricity cable between two poles A and B of equal height placed 14 metres apart has the shape of a catenary:
y=20cosh(x/20) - 15, where x and y are measured in metres.
a) find the slope where the cable meets the pole B..
A: I found dy/dx @ x=7 and my answer was 0.35712
b)Find the angle between cable B and the pole?!
How do u do this??:o
Also if you had to find an approximate value for e... will 7^1/2 be useful??
thnks a lot for the reply!!
Thanks a lot guys;))
how do u find the taylor polynomial of degree 9 of f(x)= e^x about x=0?
hey... Suppose a linear transformation T is defined by a 4x3 matrix, can T be onto?
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