Say there are 15 viral flu particles in the air, 9 of which are drug sensi-...
Say there are 15 viral flu particles in the air, 9 of which are
drug sensi- tive and 6 that are resistant. If you inhale 5
particles total, what is the probability that (a) the particles are
all resistant? (b) the particles are all sensitive?
Homework Answers
x items are selected from n items by nCx ways.
Where ,
nCx = n! / [ ( n -x)! * x! ]
a)
P(All resistant) = 6C5 / 15C5
= 6 / 3003
= 0.0020
b)
P(All sensitive ) = 9C5 / 15C5
= 126 / 3003
= 0.0420
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