Covid-19

Data showed that 22% of people in a small town was infected with the COVID-19 virus. A random sample of six
residents from this town was selected. Find the probability that exactly two of these residents was infected.

Correct result:

p =  26.8729 %

Solution:

q=22%=22100=0.22  C2(6)=(62)=6!2!(62)!=6521=15  p=100 (62) q2 (1q)4=100 15 0.222 (10.22)4=26.8729%



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