SOLUTION: Can Iget some help with this problem please.I tried some of it but get stuck. Thanks Kim The recovery rate from the flu is 0.9. If 4 people get the flu waht is the probabilty that

Question 424044: Can Iget some help with this problem please.I tried some of it but get stuck. Thanks Kim
The recovery rate from the flu is 0.9. If 4 people get the flu waht is the probabilty that
all will recover?
0.9^4=.656
at least 2 will recover?
C(4,2)=6 ways
0.9*0.9*0.1*0.1=0.0081
exactly 2 will recover?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The recovery rate from the flu is 0.9.
Probability a person does not recover = 0.1
-------------------------------------------------------
If 4 people get the flu what is the probabilty
that all will recover?
0.9^4=.6561
-------------------------
at least 2 will recover?
P(2 <= x <= 4) = 1 - P(0<= x <=1)
= 1 - [0.6561 + 4C1*0.9*0.1^3]
= 1 - [0.6597]
= 0.3403
==============
exactly 2 will recover:
P(x= 2) = 4C2*0.9^2*0.1^2 = 0.0486
==============
Cheers,
Stan H.
==============
RELATED QUESTIONS
ok I am a bit stuck on what to do here I tried the solvers but it keeps telling me an... (answered by vleith,jim_thompson5910)

Hello I need some help with this problem: {{{4x^5-3x^3}}} I need to factor it into... (answered by astromathman)

Please help me with this problem. I have the answer sheet but I am stuck on some of the... (answered by richwmiller)

Can I please get some help with this word problem? The price of an item is given by... (answered by venugopalramana)

If i could please get some help with this i have tried every source but this one please... (answered by lwsshak3)

Mr. Wise bought $1950 worth of stock, some at $3.00 per share and some at $4.50 per... (answered by jonvaliente)

please help me with this problem. i really need some help!!! perform the indicated... (answered by jim_thompson5910,checkley77)

Can I get some help with this problem? Marketing survey shows that 90% of all households (answered by stanbon)

The problem is transforming equations, 3(x+5)=4x. I started doing the problem I got stuck (answered by stanbon)