Genetic disease

One genetic disease was tested positive in both parents of one family. It has been known that any child in this family has a 25% risk of inheriting the disease. A family has 3 children. What is the probability of this family having one child who inherited this genetic disease?

Correct answer:

p =  0.4219

Step-by-step explanation:

C1(3)=(13)=1!(31)!3!=13=3 q=25%=10025=0.25 n=3 k=1  p=(kn) qk (1q)nk=3 0.251 (10.25)31=0.4219

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