There is a 20% probability that a person inoculated with a particular vaccine will get the disease anyway. A county health office inoculates 83 people. What is the probability that exactly 10 of them will get the disease at some point in their lives?

PLEASE HELP PLEASE

Question

There is a 20% probability that a person inoculated with a particular vaccine will get the disease anyway. A county health office inoculates 83 people. What is the probability that exactly 10 of them will get the disease at some point in their lives?

PLEASE HELP PLEASE

perl · Answer

this is a binomial problem

anonymous · Answer

HOW? @perl

anonymous · Answer

My answer choices are 

0.0202

0.0210

0.0412

0.9587

dan815 · Answer

out of 83 people 10 are being infected

dan815 · Answer

there is a 20% prob of failure(infected)

dan815 · Answer

83 choose 10 * 0.2^10*0.8^73

dan815 · Answer

u shud look at small cases to see the pattern

perl · Answer

There is a 20% probability that a person inoculated with a particular vaccine will get the disease anyway. A county health office inoculates 83 people. What is the probability that exactly 10 of them will get the disease at some point in their lives?

 
Let  X = # of people who get disease at some point in their life 

 we want 
P( X = 10)   = (83 choose 10 ) * (.2)^10 * (.8)^73

dan815 · Answer

like say for 5 vaccinated what is the chance that 2 are infected

perl · Answer

you can also use TI 83 calculator
binompdf ( 83, .2, 10)

anonymous · Answer

im still really confused.. @perl @dan815

dan815 · Answer

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